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BY-WUBET M.(MEDICAL INTER)
MODERATOR-Dr. HASSEN (INTERNIST)
Dr. REDIET(MD)
ACUTE CORONARY
SYNDROME MANAGEMENT
OUTLINES
6/2/2023
WUBET, ACS,
 Case presentation
 Introduction
 Clinical presentation
 Diagnosis
 Management
 Complications
 Case management strength and pitfalls
2
CASE PRESENTATION
6/2/2023
WUBET, ACS,
 D.M an 81 years old male pt from Assela admitted
on 27122008 and discharged on 01/01/2009
Eth.c
CC-Exacerbation of chest pain /5hrs
duration
Presented with a left side of squeezing
type of chest pain which radiates to his left
shoulder & left arm. The pain begins while
he was sitting and it is very severe, during
the episode he experienced nausea,
3
CASE PRESENTATION
6/2/2023
WUBET, ACS,
 No aggravating or relieving factor
 He had the same attack a week back
 Otherwise no hx of cough, orthopenia ,
PND or body sweeling
 Has no hx of fever or headache
 No hx of intermittent claudication
 No hx of smoking
 No hx of known DM, HTN or cardiac illness
4
PHYSICAL EXAMINATION
6/2/2023
WUBET, ACS,
 GA-ASL
 VS-BP-11080mmhg PR-80(RR)
RR-28 Temp. 36.5 OC
 HEENT-Pink conjunctiva & NIS
-Wet tongue & buccal mucosa
 LGS-No LAP
 Chest-no SC & IC retraction
resonant, clear with good air entry
5
PHYSICAL EXAMINATION
6/2/2023
WUBET, ACS,
 CVS-all accessible arteries are palpable
with full volume
 JVP not raised
 Quiet pericordium
 Apical impulse at 5th ICS lateral to MCL
 No heave or thrill
 S1 & S2 well heard
 No murmur or gallop
6
PHYSICAL EXAMINATION
6/2/2023
WUBET, ACS,
 Abdomen-flat which moves with respiration
soft & non tender
 no mass or organomegally
 GUS-no CVAT
 MSS-no edema
 INTG-no pallor
 CNS-concsious & well oriented
GCS-1515
7
Asst- Acute coronary syndrome
6/2/2023
WUBET, ACS,
PLAN
 Do cardiac troponin, RFT, serum
electrolyte, echo, coagulation profile
 Put in INo2
 Strict bed rest
 ASA 325mg po loading then 81mg po/day
 Clopidogrel 300mg po loading then 75mg
po/day
 Atrovastatine 80mg po/day
8
PLAN…
6/2/2023
WUBET, ACS,
 Atenolol 25mg po/day
 Enalapril 5mg po/day
 Bisacodyl 5mg po/day
 Heparin 4000IU IV loading then 12,500IU
SC BID
 Tramadol 50mg IV TID
 Cemitidine 200 mg IV bid
 Followed with cardiac follow chart
9
INVESTIGATSIONS
6/2/2023
WUBET, ACS,
 CBC
 WBC-7300
 N-61.6%
 L-28.8%
 RBC-45600
 HGB-14.3gdl
 HCT-44.1%
 PLT-42300
 RBS-140g/dl
 Serum electrolytes
 K-6.69mmol/l
 Na -146.2mmol/l
 Cl -110.9mmol/l
 Cardiac troponin(TNIU)
 5.49g/l
 Coagulation profile
 PT-16.2 Sec
 PTT-34.8 Sec
 INR-1.39
 Lipide profile
 Tc-197mg/dl
 TG-140mg/dl
 HDL-51mg/dl
 LDL-118mg/dl
 RFT
 UREA-46mg/dl
 Cr.-1.25mg/dl
10
ECG
6/2/2023
WUBET, ACS,
 ST segment elevation
from V1-V5
 Poor T wave
progression V1&V4
11
After IX……Asst-STEMI+
Hyperkalemia
6/2/2023
WUBET, ACS,
 Hyperkalemia managed by regular insulin
10IU IV Stat and giving 3 vials of 40%
dextrose iv push then D10% with 40
dropes for 4 hours
 lasix 20mg IV stat
 After management….K-4.99mmol/L
12
PROGRESS NOTE
6/2/2023
WUBET, ACS,
 P: On his 3rd DOA for the dx of STEMI
 Done: All above management plans
 Subj: The chest pain is decreasing in
intensity
 Obj: V/S: BP=80/50, PR=48, RR=26,
T=36.2C
 Each system finding =The same
 Asst: The same + hypotension
 Plan: Hold Atenolol & Enalapril
Challenge with 300ml of NS
13
Progress note
6/2/2023
WUBET, ACS,
14
 P: On his 5th DOA for the dx of STEMI
 Done: All above management plans
 Subj: no chest pain
 Obj: GA =Well Looking
 V/S: BP=90/70, PR=72, RR=24,
T=35.9C
 Each system finding =The same
 Asst: The same
 Plan: Do RFT, ECG
Continue the other mgt
Discharge Summary
6/2/2023
WUBET, ACS,
15
 S: NO Complaint
 Obj: BP =10070 PR=68 RR=24 T =36.7C
Plan: -ASA 81mg po/day
Atrovastatin 40mg po/day
Enalapril 2.5mg po/day
Clopidogrel 75mg po/day
Bisacondyl 5 mg po/day
Warfarin 5mg po/day
Appointed after 1week(addition of
Metoprolol, adjustment of Enalapril)
INTRODACTION
6/2/2023
WUBET, ACS,
 IHD is a condition in which there is an
inadequate supply of bd & O2 to the
portion of myocardium
 Spectrum of presentasion
1. Asymptomatic
2. Sudden cardiac death
3. Ischemic CMP
4. Stable angina
5. Acute coronary syndrome
A. Unstable angina
B. NSTEMI
16
EPIDIMOLOGY
6/2/2023
WUBET, ACS,
 More than 1.4 million individuals in the US are
hospitalized annually with ACS, of whom
approximately two thirds have NSTE-ACS. More
 than half of those with NSTE-ACS are older than 65
years, and almost half
 are women. NSTE-ACS is more common in
individuals with one or more
 risk factors for atherosclerosis (Chapter 51),
peripheral vascular disease, or a
 chronic inflammatory disorder, such as rheumatoid
arthritis, psoriasis, or
 infection
17
ACUTE CORONARY
SYNDROME
6/2/2023
WUBET, ACS,
 Unstable angina -Symptoms of MI but no
elevation in cardiac enzymes and +-
ECG changes
 NSTEMI – No ST elevation on ECG ,
elevated cardiac enzymes and
symptoms of MI
 STEMI – Significant ST elevation or new
LBBB on ECG, elevated cardiac
enzymes, symptoms of MI
18
6/2/2023
WUBET, ACS,
19
UNSTABLE ANGINA AND
NSTEMI
6/2/2023
WUBET, ACS,
PATHOPHSIOLOGY
 NSTE-ACS is most commonly caused by
an imbalance b/n O2 supply and O2
demand resulting from a partially
occluding thrombus forming on a
disrupted atherothrombotic coronary
plaque or on eroded coronary artery
endothelium
20
PATHOPHYSIOLOGY…
6/2/2023
WUBET, ACS,
 Dynamic obstruction (e.g. coronary
spasm, as in PVA)
 Severe mechanical obstruction due to
progressive coronary atherosclerosis;
and
 Increased myocardial oxygen demand
produced by conditions such as fever,
tachycardia, and thyrotoxicosis in the
presence of fixed epicardial coronary
obstruction
21
CLINICAL PRESENTATION
6/2/2023
WUBET, ACS,
 Chest pain,
Often severe enough to be described as
frank pain
Typically located in the substernal region
or sometimes in the epigastrium
Radiates to the left arm, left shoulder,
and/or neck
22
CLINICAL PRESENTATION
6/2/2023
WUBET, ACS,
 Chest discomfort; at least one of three
features:
1. It occurs at rest (or with minimal
exertion), lasting >10 minutes;
2. It is of relatively recent onset (i.e.,with
in the prior 2wks); and/or
3. It occurs with a crescendo pattern
23
CLINICAL PRESENTATION
6/2/2023
WUBET, ACS,
 Anginal "equivalents“-more in elderly,
females and diabetic
dyspnea
epigastric discomfort
nausea
fatigue, and faintness
24
PHYSICAL FINDING
6/2/2023
WUBET, ACS,
 If a large area of MI or a large NSTEMI,
Diaphoresis
Pale, cool skin
Sinus tachycardia
A third and/or fourth heart sound
Basilar rales; and
Sometimes, hypotension
25
DIAGNOSTIC EVALUATION
6/2/2023
WUBET, ACS,
 3 major noninvasive tools are used in the
evaluation of NSTEMI-ACS:
1. The ECG
2. Cardiac biomarkers
3. Stress testing
26
ELECTROCARDIOGRAM
6/2/2023
WUBET, ACS,
 ST-segment depression occurs in 30-
50% of patients
 T -wave changes are common but are
less specific signs of ischemia, unless
they are new and deep T-wave inversions (
>0.3 Mv)
27
CARDIAC BIOMARKERS
6/2/2023
WUBET, ACS,
 NSTEMI pt have elevated biomarkers of
necrosis, such as cardiac troponin I or T,
which are specific, sensitive, and the
preferred markers of myocardial necrosis
 Distinguish patients with NSTEMI from
those with UA
28
ST-Segment Elevation MI
6/2/2023
WUBET, ACS,
PATHOPHYSIOLOGY
 Usually occurs when coronary blood
flow decreases abruptly after a
thrombotic occlusion of a coronary
artery previously affected by
atherosclerosis
29
PATHOPHYSIOLOGY
6/2/2023
WUBET, ACS,
 Amount of myocardial damage caused
depends on:
1. The territory
2. Whether or not the vessel totally
occluded
3. The duration
4. The quantity of blood supplied by
collateral vessels
5. The demand for oxygen of the
myocardium
30
CLINICAL PRESENTATION
6/2/2023
WUBET, ACS,
 Precipitating factors before STEMI, such
as:
vigorous physical exercise
emotional stress, or
a medical or surgical illness
 Pain is the most common presenting
complaint
Deep and visceral
Heavy, Squeezing, and crushing
Occasionally, it is described as stabbing
31
DDX
6/2/2023
WUBET, ACS,
 Acute pericarditis
 Pulmonary embolism
 Acute aortic dissection
 Costochondritis, and
 Gastrointestinal disorders
32
CLINICAL PRESENTASIONS
6/2/2023
WUBET, ACS,
 Pallor, perspiration & coolness of the
extremities
 Substernal chest pain persisting for
>30min
 Precordium is usually quiet, & AI d/t to
palpate
 Ventricular dysfunction:
4th and 3rd heart sounds
decreased intensity of the 1st HS, and
paradoxical splitting of the 2nd HS
33
LABORATORY FINDING
6/2/2023
WUBET, ACS,
 STEMI progresses through the ff
temporal stages:
Acute (first few hours-7 days)
Healing (7-28 days), and
Healed (>29days)
34
LABORATORY FINDING
6/2/2023
WUBET, ACS,
 The laboratory tests of value in
confirming the diagnosis may be
divided into 4 groups:
ECG
Serum cardiac biomarkers
Cardiac imaging, and
Nonspecific indices of tissue necrosis
and inflammation
35
ECG
6/2/2023
WUBET, ACS,
 During the initial stage, total occlusion of
an ECA produces ST-segment elevation
 A minority of patients who present
initially without ST-segment elevation
may develop a Q-wave MI
36
ECG
6/2/2023
WUBET, ACS,
 Anterior wall ischemia – 2 or more of
precordial leads (V1-V6)
 Anteroseptal ischemia – Leads V1 to V3
 Apical or lateral ischemia – Leads aVL and
I, & leads V4 to V6
 Inferior wall ischemia – Leads II, III, and
aVF
 Right ventricular ischemia – Right-sided
precordial leads
 Posterior wall ischemia – Posterior
37
6/2/2023
WUBET, ACS,
ISCHEMIA LEADS ARTEARY
Anterior wall 2 or more of
precordial leads
(V1-V6)
Anteroseptal Leads V1 to V3
Apical or lateral aVL and I & leads
V4 to V6
Inferior wall II, III, and aVF
Right ventricular Right-sided
precordial
Posterior wall Posterior
precordial
38
CARDIAC TROPONIN
6/2/2023
WUBET, ACS,
 The criteria for AMI require a rise and/or
fall in cardiac biomarker values with at
least one value above the 99th percentile
of the upper reference limit for normal
individuals
39
Cardiac-specific Troponin
6/2/2023
WUBET, ACS,
 cTnT and cTnI have amino-acid
sequences different from those of the
skeletal muscle forms of these proteins
 Not normally detectable in the blood of
healthy individuals
 Levels of cTnl and cTnT may remain
elevated for 7- 10 days after STEMI
40
Creatine Phosphokinase
6/2/2023
WUBET, ACS,
 Rises within 4-8h & returns to normal by
48-72 hr
 It has lack of specificity for STEMI
 The MB isoenzyme of CK has the
advantage over total CK that it is not
present in significant concentrations in
extracardiac tissue and therefore is
considerably more specific
41
CARDIAC IMAGING
6/2/2023
WUBET, ACS,
Echocardiography
Abnormalities of wall motion
As a screening tool in the Emergency
Detection of reduced function of LV
serves as an indication for therapy with
ACEI
Doppler echo is useful in the detection
of a VSD and MR
Radionuclide Imaging Techniques
Cardiac MR
42
MANAGEMENT
PREHOSPITAL CARE
44
1. Recognition of symptoms by the pt &
prompt seeking of medical attention
2. Rapid deployment of an emergency
medical team capable of performing
resuscitative maneuvers
3. Expeditious transportation of the patient to
a hospital facility that is continuously
staffed by physicians & nurses skilled in
managing arrhythmias & providing
advanced cardiac life support
4. Expeditious implementation of reperfusion
6/2/2023
WUBET, ACS,
EMERGENCY DEPARTMENT
45
 Aspirin is essential in the mgt of patients
with suspected STEMI & is effective
across the entire spectrum of ACS
 When hypoxemia is present, O2 should
be administered by nasal prongs or face
mask (2-4 L/min) for the first 6-12 h after
infarction; the patient should then be
reassessed to determine if there is a
continued need for such treatment
6/2/2023
WUBET, ACS,
CONTROL OF DISCOMFORT
46
 Sublingual Nitroglycerin
Up to three doses of 0.4mg at about 5-min
intervals
Capable of both decreasing myocardial O2
demand & increasing myocardial O2 supply
 Contraindication
SBP <90 mmHg
Clinical suspicion of RV infarction (inferior
infarction on ECG, elevated JVP, clear
lungs, & hypotension)
6/2/2023
WUBET, ACS,
CONTROL OF DISCOMFORT
47
 Morphine
Is a very effective analgesic for the pain
Morphine is routinely administered by
repetitive (every 5min) IV injection of small
doses (2-4 mg)
6/2/2023
WUBET, ACS,
CONTROL OF DISCOMFORT
48
IV beta blockers
Control pain effectively in some patients,
presumably by diminishing myocardial O2
demand and hence ischemia
Oral beta blocker therapy should be
initiated in the first 24h
6/2/2023
WUBET, ACS,
CONTRAINDICATIONS OF B
ABSOLUTE RELATIVE
6/2/2023
WUBET, ACS,
49
 Signs of heart
failure
 Evidence of a
low-output state
 Increased risk for
cardiogenic shock
 PR interval >0.24
sec
 2nd or 3rd degree
heart block
 Active asthma, or
 Reactive airway
disease
CONTROL OF DISCOMFORT…
50
 Metoprolol 5mg Q 2-5min for a total of 3
doses, if
HR >60 beats/min
SBP > 100 mmHg
PR interval <0.24s, and
Rales, no higher than 10 cm up from the
diaphragm
 15min after the last IV dose, an oral regimen
is initiated of 50mg Q 6h for 48h, followed
by 100mg every 12h
6/2/2023
WUBET, ACS,
FIBRINOLYSIS
51
 If no contraindications are present
fibrinolytic therapy should ideally be initiated
within 30min of presentation
 Relative contraindications:
Current use of anticoagulants(INR >2 )
A recent (<2 wks) invasive or surgical
procedure or prolonged (>10min)
cardiopulmonary resuscitation, known
bleeding diathesis
6/2/2023
WUBET, ACS,
FIBRINOLYSIS
6/2/2023
WUBET, ACS,
 Pregnancy
 A hemorrhagic ophthalmic condition
(e.g., hemorrhagic diabetic retinopathy)
 Active PUD
 History of severe hypertension that is
currently adequately controlled.
52
HOSPITAL PHASE
MANAGEMENT
6/2/2023
WUBET, ACS,
Activity
 Kept at bed rest for first 6-12h
 By the 2nd or 3rd day, pts typically are
ambulating in their room
 By day 3 after infarction, pts should be
increasing their ambulation progressively
to a goal of 185m (600 ft) at least three
times a day
53
DIET
6/2/2023
WUBET, ACS,
 Because of the risk of emesis and aspiration
, pts should receive either nothing or only
clear liquids by mouth for the first 4-12h
 < 30% of total calories as fat and a cholesterol
content of 300mg/d
 Complex carbohydrates should make up 50-
55% of total calories
 Frequent & small, & enriched with foods that
are high in K, Mg & fiber, but low in sodium.
 If DM and hypertriglyceridemia, restriction of
concentrated sweets
54
Bowel Management
55
 Bed rest and the effect of the narcotics
used for the relief of pain often lead to
constipation
 A bedside commode rather than a bedpan,
a diet rich in bulk, and the routine use of a
stool softener such as dioctyl sodium
sulfosuccinate (200 mg/d) are recom-
mended
 If the patient remains constipated despite
these measures, a laxative can be 6/2/2023
WUBET, ACS,
SEDATION
56
 To withstand the period of enforced
inactivity with tranquility
 Attention to this problem is especially
important during the first few days
Diazepam5 mg
Oxazepam15-30 mg or
Lorazepam0.5-2 mg given three to four
times daily
6/2/2023
WUBET, ACS,
PHARMACOTHERAPY
6/2/2023
WUBET, ACS,
ANTITHROMBOTIC AGENTS
 Antiplatelet and anticoagulant therapy
 Primary goal
To maintain patency of the infarct related
artery
Reperfusion strategies
 Secondary goal
To reduce the patient's tendency to
thrombosis
57
Antiplatelet Drugs
58
Aspirin
 Initial treatment
 Platelet cyclooxygenase inhibitor
 Initial dose is 325 mg/d, 75-100 mg/d
thereafter
 Contraindications are:
active bleeding
aspirin intolerance
6/2/2023
WUBET, ACS,
Antiplatelet Drugs
59
Thienopyridine clopidogrel
 Causes irreversible blockade of the platelet
P2Y12 recp
 When added to aspirin, dual antiplatelet
therapy, shown a 20% relative reduction in:
cardiovascular death
MI or stroke
 Compared to aspirin alone but to be
associated with a moderate (absolute 1%)6/2/2023
WUBET, ACS,
Antiplatelet Drugs
60
Glycoprotein Ilb/ IIla inhibitors
 IV P2Y12 receptor blockers
 The addition of these agents to aspirin & a
P2Y12 inhibitor should be reserved for
unstable pts with
recurrent rest pain
elevated cTn, and ECG changes
those who have a coronary thrombus
evident on angiography when they 6/2/2023
WUBET, ACS,
Anticoagulants
61
 Four options,
1. UFH, long the mainstay of therapy
2. LMWH, enoxaparin, superior to UFH
in reducing recurrent cardiac events,
but increase in bleeding
3. Bivalirudin, a direct thrombin inhibitor
that is similar in efficacy
4. Fondaparinux, the indirect factor Xa
inhibitor
6/2/2023
WUBET, ACS,
Antithrombotic
62
 Therefore, attention must be directed to
the doses of antithrombotic agents,
accounting for:
Body weight
Cr clearance
A previous history of excessive
bleeding, as a means of reducing the
risk of bleeding
6/2/2023
WUBET, ACS,
ANTITHROMBOTIC AGENTS
6/2/2023
WUBET, ACS,
 Patients at increased risk of systemic or
PTE:
 with an anterior location of the infarction
 Severe LV dysfunction & HF
 A history of embolism
 two-dimensional echo evidence of mural
thrombus
 AF
 Such individuals should receive full
therapeutic levels of anticoagulant therapy
while hospitalized, followed by at least 3
63
Beta Adrenergic Blockers
64
 Started by IV route in pts with severe
ischemia, but this is contraindicated in the
presence of HF
 Ordinarily, oral beta blockade targeted to a
HR of 50-60beats/min
 HR-slowing CCBs, e.g., verapamil or
diltiazem, are recommended
6/2/2023
WUBET, ACS,
Benefits of beta blockers
65
Acute intravenous beta blockade:
Improves myocardial O2 supply demand
r/ship
Decreases pain
Reduces infarct size
Decreases the incidence of serious
ventricular arrhythmias
 In patients who undergo fibrinolysis soon
after the onset of chest pain, recurrent
ischemia and reinfarction are reduced 6/2/2023
WUBET, ACS,
INHIBITION OF THE RAAS
6/2/2023
WUBET, ACS,
 ACEI reduce the mortality rate after
STEMI
 The maximum benefit seen in high-risk
patients
elderly
anterior infarction
a prior infarction
globally depressed LV function
 The mechanism involves a reduction in
ventricular remodeling after infarction
66
INHIBITION OF THE RAAS
6/2/2023
WUBET, ACS,
 Before hospital discharge, assess LV
function with an imaging study
 ACE inhibitors should be continued
indefinitely
Clinical evident of CHF
Imaging study shows a reduction in
global LV function or a large regional
wall motion abnormality
In those who are hypertensive
67
OTHER AGENTS
68
 The benefits of routine use of IV
nitroglycerin are less in the
contemporary era where beta-
adrenoceptor blockers and ACE
inhibitors are routinely prescribed for
patients with STEMI
 The routine use of calcium antagonists
cannot be recommended
6/2/2023
WUBET, ACS,
INVASIVE STRATEGY
69
 Multiple clinical trials have demonstrated
the benefit of an early invasive strategy in
high-risk patients, i .e:
patients with multiple clinical risk factors
ST-segment deviation, and/or
positive biomarkers
6/2/2023
WUBET, ACS,
INVASIVE STRATEGY
70
 In this strategy, following treatment with
anti ischemic and antithrombotic
agents, coronary arteriography is carried
out within 48h of presentation,
 Followed by coronary revascularization
(PCI or coronary artery bypass
grafting), depending on the coronary
anatomy.
6/2/2023
WUBET, ACS,
6/2/2023
WUBET, ACS,
71
Complications
6/2/2023
WUBET, ACS,
 Electrical complications (arrhythmias)
And
 Mechanical complications ("pump
failure")
72
COMPLlCATIONS
6/2/2023
WUBET, ACS,
1.VENTRICULAR DYSFUNCTION
 Soon after STEMI, the LV begins to
dilate
 In patients with an EF <40%, regardless
of whether or not HF is present, ACE
inhibitors or ARBs should be prescribed
73
COMPLlCATIONS ….
6/2/2023
WUBET, ACS,
2. Pump failure
 Killip divides patients into 4 groups:
I. No signs of pulmonary or venous congestion
II. Moderate HF
III. Severe HF, pulmonary edema; and
IV. Shock, SBP <90 mmHg & evidence of
peripheral vasoconstriction, peripheral
cyanosis, mental confusion,& oliguria
 Infarction of >40% of the left ventricle results
in cardiogenic shock
74
Complication..
75
3. HYPOVOLEMIA
 It may be secondary to:
 previous diuretic use
 reduced fluid intake during the early stages of
the illness,
 vomiting associated with pain or medications
 Cautious fluid administration during careful
monitoring of oxygenation and cardiac
output
6/2/2023
WUBET, ACS,
LONG-TERM MANAGEMENT
76
 Risk-factor modification is key,
Smoking cessation,
Achieving optimal weight,
Daily exercise,
Blood -pressure control,
Appropriate diet,
control of hyperglycemia (in diabetic
patients)
lipid management 6/2/2023
WUBET, ACS,
SECONDARY PREVENTION
77
 Antiplatelet agent associated with a 25%
reduction in the risk of recurrent infarction,
stroke, or cardiovascular mortality
 ACEI or ARBs and, aldosterone antagonists
should be used by patients with clinically
evident HF, a moderate decrease in global
ejection fraction, or a large regional wall motion
abnormality to prevent late ventricular
remodeling and recurrent ischemic events
 The chronic routine use of oral beta-
adrenoceptor blockers for at least 2 years
after STEMI 6/2/2023
WUBET, ACS,
CASE MANAGEMENT
STRENGTH PITFALLS
6/2/2023
WUBET, ACS,
 Mgt is started
early & all
inclusive
 Investigated well
 Discharge
summery written
in detail with
short appointment
 Serial ECG not
done
 Echo not done
 Vital sign not
attached to the
chart
78
REFERENCES
6/2/2023
WUBET, ACS,
 HARRISON PRINCIPLES OF
INTERNAL MEDICINE ( 19th ed )
 UPTODATE 21.2
79

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ACS Management Outline

  • 1. BY-WUBET M.(MEDICAL INTER) MODERATOR-Dr. HASSEN (INTERNIST) Dr. REDIET(MD) ACUTE CORONARY SYNDROME MANAGEMENT
  • 2. OUTLINES 6/2/2023 WUBET, ACS,  Case presentation  Introduction  Clinical presentation  Diagnosis  Management  Complications  Case management strength and pitfalls 2
  • 3. CASE PRESENTATION 6/2/2023 WUBET, ACS,  D.M an 81 years old male pt from Assela admitted on 27122008 and discharged on 01/01/2009 Eth.c CC-Exacerbation of chest pain /5hrs duration Presented with a left side of squeezing type of chest pain which radiates to his left shoulder & left arm. The pain begins while he was sitting and it is very severe, during the episode he experienced nausea, 3
  • 4. CASE PRESENTATION 6/2/2023 WUBET, ACS,  No aggravating or relieving factor  He had the same attack a week back  Otherwise no hx of cough, orthopenia , PND or body sweeling  Has no hx of fever or headache  No hx of intermittent claudication  No hx of smoking  No hx of known DM, HTN or cardiac illness 4
  • 5. PHYSICAL EXAMINATION 6/2/2023 WUBET, ACS,  GA-ASL  VS-BP-11080mmhg PR-80(RR) RR-28 Temp. 36.5 OC  HEENT-Pink conjunctiva & NIS -Wet tongue & buccal mucosa  LGS-No LAP  Chest-no SC & IC retraction resonant, clear with good air entry 5
  • 6. PHYSICAL EXAMINATION 6/2/2023 WUBET, ACS,  CVS-all accessible arteries are palpable with full volume  JVP not raised  Quiet pericordium  Apical impulse at 5th ICS lateral to MCL  No heave or thrill  S1 & S2 well heard  No murmur or gallop 6
  • 7. PHYSICAL EXAMINATION 6/2/2023 WUBET, ACS,  Abdomen-flat which moves with respiration soft & non tender  no mass or organomegally  GUS-no CVAT  MSS-no edema  INTG-no pallor  CNS-concsious & well oriented GCS-1515 7
  • 8. Asst- Acute coronary syndrome 6/2/2023 WUBET, ACS, PLAN  Do cardiac troponin, RFT, serum electrolyte, echo, coagulation profile  Put in INo2  Strict bed rest  ASA 325mg po loading then 81mg po/day  Clopidogrel 300mg po loading then 75mg po/day  Atrovastatine 80mg po/day 8
  • 9. PLAN… 6/2/2023 WUBET, ACS,  Atenolol 25mg po/day  Enalapril 5mg po/day  Bisacodyl 5mg po/day  Heparin 4000IU IV loading then 12,500IU SC BID  Tramadol 50mg IV TID  Cemitidine 200 mg IV bid  Followed with cardiac follow chart 9
  • 10. INVESTIGATSIONS 6/2/2023 WUBET, ACS,  CBC  WBC-7300  N-61.6%  L-28.8%  RBC-45600  HGB-14.3gdl  HCT-44.1%  PLT-42300  RBS-140g/dl  Serum electrolytes  K-6.69mmol/l  Na -146.2mmol/l  Cl -110.9mmol/l  Cardiac troponin(TNIU)  5.49g/l  Coagulation profile  PT-16.2 Sec  PTT-34.8 Sec  INR-1.39  Lipide profile  Tc-197mg/dl  TG-140mg/dl  HDL-51mg/dl  LDL-118mg/dl  RFT  UREA-46mg/dl  Cr.-1.25mg/dl 10
  • 11. ECG 6/2/2023 WUBET, ACS,  ST segment elevation from V1-V5  Poor T wave progression V1&V4 11
  • 12. After IX……Asst-STEMI+ Hyperkalemia 6/2/2023 WUBET, ACS,  Hyperkalemia managed by regular insulin 10IU IV Stat and giving 3 vials of 40% dextrose iv push then D10% with 40 dropes for 4 hours  lasix 20mg IV stat  After management….K-4.99mmol/L 12
  • 13. PROGRESS NOTE 6/2/2023 WUBET, ACS,  P: On his 3rd DOA for the dx of STEMI  Done: All above management plans  Subj: The chest pain is decreasing in intensity  Obj: V/S: BP=80/50, PR=48, RR=26, T=36.2C  Each system finding =The same  Asst: The same + hypotension  Plan: Hold Atenolol & Enalapril Challenge with 300ml of NS 13
  • 14. Progress note 6/2/2023 WUBET, ACS, 14  P: On his 5th DOA for the dx of STEMI  Done: All above management plans  Subj: no chest pain  Obj: GA =Well Looking  V/S: BP=90/70, PR=72, RR=24, T=35.9C  Each system finding =The same  Asst: The same  Plan: Do RFT, ECG Continue the other mgt
  • 15. Discharge Summary 6/2/2023 WUBET, ACS, 15  S: NO Complaint  Obj: BP =10070 PR=68 RR=24 T =36.7C Plan: -ASA 81mg po/day Atrovastatin 40mg po/day Enalapril 2.5mg po/day Clopidogrel 75mg po/day Bisacondyl 5 mg po/day Warfarin 5mg po/day Appointed after 1week(addition of Metoprolol, adjustment of Enalapril)
  • 16. INTRODACTION 6/2/2023 WUBET, ACS,  IHD is a condition in which there is an inadequate supply of bd & O2 to the portion of myocardium  Spectrum of presentasion 1. Asymptomatic 2. Sudden cardiac death 3. Ischemic CMP 4. Stable angina 5. Acute coronary syndrome A. Unstable angina B. NSTEMI 16
  • 17. EPIDIMOLOGY 6/2/2023 WUBET, ACS,  More than 1.4 million individuals in the US are hospitalized annually with ACS, of whom approximately two thirds have NSTE-ACS. More  than half of those with NSTE-ACS are older than 65 years, and almost half  are women. NSTE-ACS is more common in individuals with one or more  risk factors for atherosclerosis (Chapter 51), peripheral vascular disease, or a  chronic inflammatory disorder, such as rheumatoid arthritis, psoriasis, or  infection 17
  • 18. ACUTE CORONARY SYNDROME 6/2/2023 WUBET, ACS,  Unstable angina -Symptoms of MI but no elevation in cardiac enzymes and +- ECG changes  NSTEMI – No ST elevation on ECG , elevated cardiac enzymes and symptoms of MI  STEMI – Significant ST elevation or new LBBB on ECG, elevated cardiac enzymes, symptoms of MI 18
  • 20. UNSTABLE ANGINA AND NSTEMI 6/2/2023 WUBET, ACS, PATHOPHSIOLOGY  NSTE-ACS is most commonly caused by an imbalance b/n O2 supply and O2 demand resulting from a partially occluding thrombus forming on a disrupted atherothrombotic coronary plaque or on eroded coronary artery endothelium 20
  • 21. PATHOPHYSIOLOGY… 6/2/2023 WUBET, ACS,  Dynamic obstruction (e.g. coronary spasm, as in PVA)  Severe mechanical obstruction due to progressive coronary atherosclerosis; and  Increased myocardial oxygen demand produced by conditions such as fever, tachycardia, and thyrotoxicosis in the presence of fixed epicardial coronary obstruction 21
  • 22. CLINICAL PRESENTATION 6/2/2023 WUBET, ACS,  Chest pain, Often severe enough to be described as frank pain Typically located in the substernal region or sometimes in the epigastrium Radiates to the left arm, left shoulder, and/or neck 22
  • 23. CLINICAL PRESENTATION 6/2/2023 WUBET, ACS,  Chest discomfort; at least one of three features: 1. It occurs at rest (or with minimal exertion), lasting >10 minutes; 2. It is of relatively recent onset (i.e.,with in the prior 2wks); and/or 3. It occurs with a crescendo pattern 23
  • 24. CLINICAL PRESENTATION 6/2/2023 WUBET, ACS,  Anginal "equivalents“-more in elderly, females and diabetic dyspnea epigastric discomfort nausea fatigue, and faintness 24
  • 25. PHYSICAL FINDING 6/2/2023 WUBET, ACS,  If a large area of MI or a large NSTEMI, Diaphoresis Pale, cool skin Sinus tachycardia A third and/or fourth heart sound Basilar rales; and Sometimes, hypotension 25
  • 26. DIAGNOSTIC EVALUATION 6/2/2023 WUBET, ACS,  3 major noninvasive tools are used in the evaluation of NSTEMI-ACS: 1. The ECG 2. Cardiac biomarkers 3. Stress testing 26
  • 27. ELECTROCARDIOGRAM 6/2/2023 WUBET, ACS,  ST-segment depression occurs in 30- 50% of patients  T -wave changes are common but are less specific signs of ischemia, unless they are new and deep T-wave inversions ( >0.3 Mv) 27
  • 28. CARDIAC BIOMARKERS 6/2/2023 WUBET, ACS,  NSTEMI pt have elevated biomarkers of necrosis, such as cardiac troponin I or T, which are specific, sensitive, and the preferred markers of myocardial necrosis  Distinguish patients with NSTEMI from those with UA 28
  • 29. ST-Segment Elevation MI 6/2/2023 WUBET, ACS, PATHOPHYSIOLOGY  Usually occurs when coronary blood flow decreases abruptly after a thrombotic occlusion of a coronary artery previously affected by atherosclerosis 29
  • 30. PATHOPHYSIOLOGY 6/2/2023 WUBET, ACS,  Amount of myocardial damage caused depends on: 1. The territory 2. Whether or not the vessel totally occluded 3. The duration 4. The quantity of blood supplied by collateral vessels 5. The demand for oxygen of the myocardium 30
  • 31. CLINICAL PRESENTATION 6/2/2023 WUBET, ACS,  Precipitating factors before STEMI, such as: vigorous physical exercise emotional stress, or a medical or surgical illness  Pain is the most common presenting complaint Deep and visceral Heavy, Squeezing, and crushing Occasionally, it is described as stabbing 31
  • 32. DDX 6/2/2023 WUBET, ACS,  Acute pericarditis  Pulmonary embolism  Acute aortic dissection  Costochondritis, and  Gastrointestinal disorders 32
  • 33. CLINICAL PRESENTASIONS 6/2/2023 WUBET, ACS,  Pallor, perspiration & coolness of the extremities  Substernal chest pain persisting for >30min  Precordium is usually quiet, & AI d/t to palpate  Ventricular dysfunction: 4th and 3rd heart sounds decreased intensity of the 1st HS, and paradoxical splitting of the 2nd HS 33
  • 34. LABORATORY FINDING 6/2/2023 WUBET, ACS,  STEMI progresses through the ff temporal stages: Acute (first few hours-7 days) Healing (7-28 days), and Healed (>29days) 34
  • 35. LABORATORY FINDING 6/2/2023 WUBET, ACS,  The laboratory tests of value in confirming the diagnosis may be divided into 4 groups: ECG Serum cardiac biomarkers Cardiac imaging, and Nonspecific indices of tissue necrosis and inflammation 35
  • 36. ECG 6/2/2023 WUBET, ACS,  During the initial stage, total occlusion of an ECA produces ST-segment elevation  A minority of patients who present initially without ST-segment elevation may develop a Q-wave MI 36
  • 37. ECG 6/2/2023 WUBET, ACS,  Anterior wall ischemia – 2 or more of precordial leads (V1-V6)  Anteroseptal ischemia – Leads V1 to V3  Apical or lateral ischemia – Leads aVL and I, & leads V4 to V6  Inferior wall ischemia – Leads II, III, and aVF  Right ventricular ischemia – Right-sided precordial leads  Posterior wall ischemia – Posterior 37
  • 38. 6/2/2023 WUBET, ACS, ISCHEMIA LEADS ARTEARY Anterior wall 2 or more of precordial leads (V1-V6) Anteroseptal Leads V1 to V3 Apical or lateral aVL and I & leads V4 to V6 Inferior wall II, III, and aVF Right ventricular Right-sided precordial Posterior wall Posterior precordial 38
  • 39. CARDIAC TROPONIN 6/2/2023 WUBET, ACS,  The criteria for AMI require a rise and/or fall in cardiac biomarker values with at least one value above the 99th percentile of the upper reference limit for normal individuals 39
  • 40. Cardiac-specific Troponin 6/2/2023 WUBET, ACS,  cTnT and cTnI have amino-acid sequences different from those of the skeletal muscle forms of these proteins  Not normally detectable in the blood of healthy individuals  Levels of cTnl and cTnT may remain elevated for 7- 10 days after STEMI 40
  • 41. Creatine Phosphokinase 6/2/2023 WUBET, ACS,  Rises within 4-8h & returns to normal by 48-72 hr  It has lack of specificity for STEMI  The MB isoenzyme of CK has the advantage over total CK that it is not present in significant concentrations in extracardiac tissue and therefore is considerably more specific 41
  • 42. CARDIAC IMAGING 6/2/2023 WUBET, ACS, Echocardiography Abnormalities of wall motion As a screening tool in the Emergency Detection of reduced function of LV serves as an indication for therapy with ACEI Doppler echo is useful in the detection of a VSD and MR Radionuclide Imaging Techniques Cardiac MR 42
  • 44. PREHOSPITAL CARE 44 1. Recognition of symptoms by the pt & prompt seeking of medical attention 2. Rapid deployment of an emergency medical team capable of performing resuscitative maneuvers 3. Expeditious transportation of the patient to a hospital facility that is continuously staffed by physicians & nurses skilled in managing arrhythmias & providing advanced cardiac life support 4. Expeditious implementation of reperfusion 6/2/2023 WUBET, ACS,
  • 45. EMERGENCY DEPARTMENT 45  Aspirin is essential in the mgt of patients with suspected STEMI & is effective across the entire spectrum of ACS  When hypoxemia is present, O2 should be administered by nasal prongs or face mask (2-4 L/min) for the first 6-12 h after infarction; the patient should then be reassessed to determine if there is a continued need for such treatment 6/2/2023 WUBET, ACS,
  • 46. CONTROL OF DISCOMFORT 46  Sublingual Nitroglycerin Up to three doses of 0.4mg at about 5-min intervals Capable of both decreasing myocardial O2 demand & increasing myocardial O2 supply  Contraindication SBP <90 mmHg Clinical suspicion of RV infarction (inferior infarction on ECG, elevated JVP, clear lungs, & hypotension) 6/2/2023 WUBET, ACS,
  • 47. CONTROL OF DISCOMFORT 47  Morphine Is a very effective analgesic for the pain Morphine is routinely administered by repetitive (every 5min) IV injection of small doses (2-4 mg) 6/2/2023 WUBET, ACS,
  • 48. CONTROL OF DISCOMFORT 48 IV beta blockers Control pain effectively in some patients, presumably by diminishing myocardial O2 demand and hence ischemia Oral beta blocker therapy should be initiated in the first 24h 6/2/2023 WUBET, ACS,
  • 49. CONTRAINDICATIONS OF B ABSOLUTE RELATIVE 6/2/2023 WUBET, ACS, 49  Signs of heart failure  Evidence of a low-output state  Increased risk for cardiogenic shock  PR interval >0.24 sec  2nd or 3rd degree heart block  Active asthma, or  Reactive airway disease
  • 50. CONTROL OF DISCOMFORT… 50  Metoprolol 5mg Q 2-5min for a total of 3 doses, if HR >60 beats/min SBP > 100 mmHg PR interval <0.24s, and Rales, no higher than 10 cm up from the diaphragm  15min after the last IV dose, an oral regimen is initiated of 50mg Q 6h for 48h, followed by 100mg every 12h 6/2/2023 WUBET, ACS,
  • 51. FIBRINOLYSIS 51  If no contraindications are present fibrinolytic therapy should ideally be initiated within 30min of presentation  Relative contraindications: Current use of anticoagulants(INR >2 ) A recent (<2 wks) invasive or surgical procedure or prolonged (>10min) cardiopulmonary resuscitation, known bleeding diathesis 6/2/2023 WUBET, ACS,
  • 52. FIBRINOLYSIS 6/2/2023 WUBET, ACS,  Pregnancy  A hemorrhagic ophthalmic condition (e.g., hemorrhagic diabetic retinopathy)  Active PUD  History of severe hypertension that is currently adequately controlled. 52
  • 53. HOSPITAL PHASE MANAGEMENT 6/2/2023 WUBET, ACS, Activity  Kept at bed rest for first 6-12h  By the 2nd or 3rd day, pts typically are ambulating in their room  By day 3 after infarction, pts should be increasing their ambulation progressively to a goal of 185m (600 ft) at least three times a day 53
  • 54. DIET 6/2/2023 WUBET, ACS,  Because of the risk of emesis and aspiration , pts should receive either nothing or only clear liquids by mouth for the first 4-12h  < 30% of total calories as fat and a cholesterol content of 300mg/d  Complex carbohydrates should make up 50- 55% of total calories  Frequent & small, & enriched with foods that are high in K, Mg & fiber, but low in sodium.  If DM and hypertriglyceridemia, restriction of concentrated sweets 54
  • 55. Bowel Management 55  Bed rest and the effect of the narcotics used for the relief of pain often lead to constipation  A bedside commode rather than a bedpan, a diet rich in bulk, and the routine use of a stool softener such as dioctyl sodium sulfosuccinate (200 mg/d) are recom- mended  If the patient remains constipated despite these measures, a laxative can be 6/2/2023 WUBET, ACS,
  • 56. SEDATION 56  To withstand the period of enforced inactivity with tranquility  Attention to this problem is especially important during the first few days Diazepam5 mg Oxazepam15-30 mg or Lorazepam0.5-2 mg given three to four times daily 6/2/2023 WUBET, ACS,
  • 57. PHARMACOTHERAPY 6/2/2023 WUBET, ACS, ANTITHROMBOTIC AGENTS  Antiplatelet and anticoagulant therapy  Primary goal To maintain patency of the infarct related artery Reperfusion strategies  Secondary goal To reduce the patient's tendency to thrombosis 57
  • 58. Antiplatelet Drugs 58 Aspirin  Initial treatment  Platelet cyclooxygenase inhibitor  Initial dose is 325 mg/d, 75-100 mg/d thereafter  Contraindications are: active bleeding aspirin intolerance 6/2/2023 WUBET, ACS,
  • 59. Antiplatelet Drugs 59 Thienopyridine clopidogrel  Causes irreversible blockade of the platelet P2Y12 recp  When added to aspirin, dual antiplatelet therapy, shown a 20% relative reduction in: cardiovascular death MI or stroke  Compared to aspirin alone but to be associated with a moderate (absolute 1%)6/2/2023 WUBET, ACS,
  • 60. Antiplatelet Drugs 60 Glycoprotein Ilb/ IIla inhibitors  IV P2Y12 receptor blockers  The addition of these agents to aspirin & a P2Y12 inhibitor should be reserved for unstable pts with recurrent rest pain elevated cTn, and ECG changes those who have a coronary thrombus evident on angiography when they 6/2/2023 WUBET, ACS,
  • 61. Anticoagulants 61  Four options, 1. UFH, long the mainstay of therapy 2. LMWH, enoxaparin, superior to UFH in reducing recurrent cardiac events, but increase in bleeding 3. Bivalirudin, a direct thrombin inhibitor that is similar in efficacy 4. Fondaparinux, the indirect factor Xa inhibitor 6/2/2023 WUBET, ACS,
  • 62. Antithrombotic 62  Therefore, attention must be directed to the doses of antithrombotic agents, accounting for: Body weight Cr clearance A previous history of excessive bleeding, as a means of reducing the risk of bleeding 6/2/2023 WUBET, ACS,
  • 63. ANTITHROMBOTIC AGENTS 6/2/2023 WUBET, ACS,  Patients at increased risk of systemic or PTE:  with an anterior location of the infarction  Severe LV dysfunction & HF  A history of embolism  two-dimensional echo evidence of mural thrombus  AF  Such individuals should receive full therapeutic levels of anticoagulant therapy while hospitalized, followed by at least 3 63
  • 64. Beta Adrenergic Blockers 64  Started by IV route in pts with severe ischemia, but this is contraindicated in the presence of HF  Ordinarily, oral beta blockade targeted to a HR of 50-60beats/min  HR-slowing CCBs, e.g., verapamil or diltiazem, are recommended 6/2/2023 WUBET, ACS,
  • 65. Benefits of beta blockers 65 Acute intravenous beta blockade: Improves myocardial O2 supply demand r/ship Decreases pain Reduces infarct size Decreases the incidence of serious ventricular arrhythmias  In patients who undergo fibrinolysis soon after the onset of chest pain, recurrent ischemia and reinfarction are reduced 6/2/2023 WUBET, ACS,
  • 66. INHIBITION OF THE RAAS 6/2/2023 WUBET, ACS,  ACEI reduce the mortality rate after STEMI  The maximum benefit seen in high-risk patients elderly anterior infarction a prior infarction globally depressed LV function  The mechanism involves a reduction in ventricular remodeling after infarction 66
  • 67. INHIBITION OF THE RAAS 6/2/2023 WUBET, ACS,  Before hospital discharge, assess LV function with an imaging study  ACE inhibitors should be continued indefinitely Clinical evident of CHF Imaging study shows a reduction in global LV function or a large regional wall motion abnormality In those who are hypertensive 67
  • 68. OTHER AGENTS 68  The benefits of routine use of IV nitroglycerin are less in the contemporary era where beta- adrenoceptor blockers and ACE inhibitors are routinely prescribed for patients with STEMI  The routine use of calcium antagonists cannot be recommended 6/2/2023 WUBET, ACS,
  • 69. INVASIVE STRATEGY 69  Multiple clinical trials have demonstrated the benefit of an early invasive strategy in high-risk patients, i .e: patients with multiple clinical risk factors ST-segment deviation, and/or positive biomarkers 6/2/2023 WUBET, ACS,
  • 70. INVASIVE STRATEGY 70  In this strategy, following treatment with anti ischemic and antithrombotic agents, coronary arteriography is carried out within 48h of presentation,  Followed by coronary revascularization (PCI or coronary artery bypass grafting), depending on the coronary anatomy. 6/2/2023 WUBET, ACS,
  • 72. Complications 6/2/2023 WUBET, ACS,  Electrical complications (arrhythmias) And  Mechanical complications ("pump failure") 72
  • 73. COMPLlCATIONS 6/2/2023 WUBET, ACS, 1.VENTRICULAR DYSFUNCTION  Soon after STEMI, the LV begins to dilate  In patients with an EF <40%, regardless of whether or not HF is present, ACE inhibitors or ARBs should be prescribed 73
  • 74. COMPLlCATIONS …. 6/2/2023 WUBET, ACS, 2. Pump failure  Killip divides patients into 4 groups: I. No signs of pulmonary or venous congestion II. Moderate HF III. Severe HF, pulmonary edema; and IV. Shock, SBP <90 mmHg & evidence of peripheral vasoconstriction, peripheral cyanosis, mental confusion,& oliguria  Infarction of >40% of the left ventricle results in cardiogenic shock 74
  • 75. Complication.. 75 3. HYPOVOLEMIA  It may be secondary to:  previous diuretic use  reduced fluid intake during the early stages of the illness,  vomiting associated with pain or medications  Cautious fluid administration during careful monitoring of oxygenation and cardiac output 6/2/2023 WUBET, ACS,
  • 76. LONG-TERM MANAGEMENT 76  Risk-factor modification is key, Smoking cessation, Achieving optimal weight, Daily exercise, Blood -pressure control, Appropriate diet, control of hyperglycemia (in diabetic patients) lipid management 6/2/2023 WUBET, ACS,
  • 77. SECONDARY PREVENTION 77  Antiplatelet agent associated with a 25% reduction in the risk of recurrent infarction, stroke, or cardiovascular mortality  ACEI or ARBs and, aldosterone antagonists should be used by patients with clinically evident HF, a moderate decrease in global ejection fraction, or a large regional wall motion abnormality to prevent late ventricular remodeling and recurrent ischemic events  The chronic routine use of oral beta- adrenoceptor blockers for at least 2 years after STEMI 6/2/2023 WUBET, ACS,
  • 78. CASE MANAGEMENT STRENGTH PITFALLS 6/2/2023 WUBET, ACS,  Mgt is started early & all inclusive  Investigated well  Discharge summery written in detail with short appointment  Serial ECG not done  Echo not done  Vital sign not attached to the chart 78
  • 79. REFERENCES 6/2/2023 WUBET, ACS,  HARRISON PRINCIPLES OF INTERNAL MEDICINE ( 19th ed )  UPTODATE 21.2 79

Editor's Notes

  1. left bundle branch block (Troponin and/or CKMB) (other ECG evidence of ischemia may or may not be present),
  2. Fol l owing d i s r u ption of a v u l nera ble plaq ue, patients experience ischemic d iscomfort res u l t i n g from a red uction o f fl ow t h ro u g h the affected ep ica rd i a l coro n a ry a rtery. The flow red uction may be ca u sed by a com pl etely occ l u s ive t h ro m b u s (right) o r s u btota l l y occ l u sive t h ro m b u s (le的Patients with ischemic d i scomfort may pr巳sent with o r without ST-segment elevation. Of pati巳nts with ST-seg ment e l 巳vation, the majority (wide red σrrow) u l t i m ately develop a Q wave on the ECG (Qw MI), w h i l e a m i n o rity (thin red σrrow) do not develop Q wave a nd, in older l itera t u 陀, were said to have s u sta i ned a non-Q-wave MI (NQMI). Patients who p resent without S干seg ment elevation a r巳suffering from 巳ither u n sta b l e a n g i n a o r a n o n-ST-seg ment elevation M I (NSTEMI) (wide gree门σrrows), a d isti nction that is u lti mately made based on the presence or a bsence of a serum cardiac m a rker such a s ζ K-MB o r a ca rd iac tropon i n detected i n the b l ood. The majority of patie nts pr巴sent l n g with N STEM I do n o t deve l o p a Q wave on the ECG; a m i n o rity develop a Qw M I (thin gree门σrrow) . Dx, d iag nosis; ECG, el ectroca rd iog ra m ; M I , myoca rd i a l i nfa rction. (Adapted from CW Hamm et al: Lancet 358: 1 533, 200 1, and MJ Davies: Heart 83:36 1, 2000; with permission from the BMJ Publishing Group.)
  3. Other causes of NSTE-ACS include:
  4. are symptoms of myocardial ischemia other than angina. They include:
  5. (i.e. Distinctly more severe, prolonged, or frequent than previous episodes)
  6. SMS OF MI OTHER THAN ANGINA
  7. ; it may be transient in patients without biomarker evidence of myocardial necrosis, but may be persistent for several days in NSTEMI.
  8. that can produce early spontaneous lysis of the occlusive thrombus, and in the infarct zone when flow is restored in the 0ccluded epicardial coronary artery.
  9. In up to 1/2 of cases,
  10. Mitral valv apparatous.
  11. if the initial ECG is not diagnostic but the patient remains symptomatic and clinical suspicion for ACS remains high, repeat ECG at least every 20 to 30 minutes
  12. Obstruction of LAD aa ….anteror or septal wall Cirumflax aa…post.wall or lateral MI RT CORONARY aa …inferior wall MI
  13. The ECG leads are usually more helpful in localizing regions of ST elevation than non-ST elevation ischemia Acute transmural anterior (including apical and lateral) wall ischemia is reflected by ST elevations or increased T-wave positivity in one or more of the precordial leads (V1–V6) and leads I and aVL. Inferior wall ischemia produces changes in leads II, III, and aVF. "Posterior" wall ischemia (usually associated with lateral or inferior involvement) may be indirectly recognized by reciprocal ST depressions in leads V1 to V3 (thus constituting an ST elevation "equivalent" acute coronary syndrome)
  14. Cardiac-specific troponin T (cTnT) and cardiac-speciic troponin I (cTnI)
  15. as CK may be elevated with skeletal muscle disease or trauma, including intramuscular injection
  16. two serious complications of STEMI.
  17. The greatest delay usually occurs not during transportation to the hospital but, rather, between the onset of pain and the patient' s decision to call for help. The prognosis in STEMI is largely related to the occurrence of two general classes of complications: Electrical complications (arrhythmias) and Mechanical complications ("pump failure"). The vast majority of deaths due to ventricular fibrillation occur within the first 24h of the onset of symptoms, and of these, over half 0ccur in the first hour.
  18. Many aspects of the treatment of STEMI are initiated in the Emergency Department and then continued during the in-hospital phase of management
  19. In patients whose initially favorable response to sublingual nitroglyιerin is followed by the return of chest discomfort, particularly if accompanied by other evidence of ongoing ischemia such as further ST-segment or T-wave shifts, the use of intravenous nitroglycerin should be considered. Nitrates should not be administered to patients who have taken a phosphodiesterase-5 inhibitor for erectile dysfunction within the preceding 24 h, because it may potentiate the hypotensive effects of nitrates. An idiosyncratic reaction to nitrates, consisting of sudden marked hypotension, sometimes occurs but can usually be reversed promptly by the rapid administration of intravenous atropine.
  20. Morphine also has a vagotonic effect and may cause bradycardia or advanced degrees of heart block, particularly in patients with inferior infarction. These side effects usually respond to atropine (0.5 mg intra­venously). Morphine is routinely administered by repetitive (every 5 min) intravenous injection of small doses (2-4 mg), rather than by the subcutaneous administration of a larger quantity, because absorp­tion may be unpredictable by the latter route.
  21. More important, there is evidence that intravenous beta blockers reduce the risks of reinfarction and ventricular fibrillation.
  22. Gluιoιorticoids and nonsteroidal anti-inlammatory agents, with the exception of aspirin, should be avoided in patients with STEMI. They can impair infarct healing and increase the risk of myocardial rupture, and their use may result in a larger infarct scar. In addition, they can increase coronary vascular resistance, thereby potentially reducing low to ischemic myocardium.
  23. The principal goal of fibrinolysis is prompt restoration of full coronary arterial patency. Hemorrhage is the most frequent and potentially the most serious complication.
  24. Factors that increase the work of the heart during the initial hours of infarction may increase the size of the infarct
  25. , where the atmosphere of 24-h vigi­lance may interfere with the patient's sleep. However, sedation is no substitute for: reassuring, quiet surroundings.
  26. Aspirin is an irreversible inhibitor of platelet cyclooxygenase and thereby interferes with platelet activation. "Aspirin resistance" has been noted in 2-8% of patients but frequently has been related to noncompliance.
  27. This regimen should continue for at least 1 year in patients with NSTE-ACS. Ticagrelor is a novel, potent, reversible platelet P2Y12 inhibitor. In the absence of a high risk for bleeding, patients with NSTE-ACS should receive a platelet P2Y12 receptor blocker to inhibit platelet activation
  28. (i .e., triple antiplatelet therapy)
  29. are available for anti­coagulant therapy to be added to antiplatelet agents: LMWH, enoxaparin, superior to UFH in reducing recurrent cardiac events, especially in patients managed by a conservative strategy but with some increase in bleeding Bivalirudin, a direct thrombin inhibitor that is similar in efficacy to either UFH or LMWH but causes less bleeding; and Fondaparinux, the indirect factor Xa inhibitor,, which is equivalent in efficacy to enoxaparin but appears to have a lower risk of major bleeding
  30. Patients who have experienced a stroke are at higher risk of intracranial bleeding with potent antiplatelet agents and combinations of antithrombotic drugs. Excessive bleeding is the most important adverse effect of all antithrombotic agents, including both antiplatelet agents and anticoagulants
  31. (LMWH or UFH)
  32. for patients who have persistent symptoms or ECG signs of ischemia after treatment with full-dose nitrates and BBs and in patients with contraindications to either class of these agents
  33. Excellent long-term prognosis defined as: an expected mortality rate of <1 % per year, patients <55 years, no previ­ous MI, with normal ventricular function, no complex ventricular ectopy, and no angina) markedly diminishes any potential benefit. blockers in patients with STEMI can be divided into those that occur immediately when the drug is given acutely and those that accrue over the long term when the drug is given for secondary prev­ention after an infarction
  34. The rate of recurrent infarction may also be lower in patients treated chronically with ACE inhibitors after infarction. with a subsequent reduction in the risk of CHF.
  35. anti­ ischemic and antithrombotic agents ---48h-- coronary arteriography  coronary revascularization
  36. Pump failure is now the primary cause of in-hospital death from STEMI….needs hemodynamic asst clinical signs are pulmonary rales ,S3 & S4 gallop
  37. Evidence suggests that warfarin lowers the risk of late mortal­ity and the incidence of reinfarction after STEMI. Most physicians prescribe aspirin routinely for all patients without contraindications and add warfarin for patients at increased risk of embolism. In pts 75 years old a low dose of aspirin (75-8 1 mg/d) in combination with warfarin administered to achieve an INR >2.0 is more efFective than aspirin alone for preventing recurrent MI and embolic cerebrovascular accident.