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
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
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
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
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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
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
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,
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,
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
left bundle branch block (Troponin and/or CKMB)
(other ECG evidence of ischemia may or may not be present),
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.)
Other causes of NSTE-ACS include:
are symptoms of myocardial ischemia other than angina.
They include:
(i.e. Distinctly more severe, prolonged, or frequent than previous episodes)
SMS OF MI OTHER THAN ANGINA
; it may be transient in patients without biomarker evidence of myocardial necrosis, but may be persistent for several days in NSTEMI.
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.
In up to 1/2 of cases,
Mitral valv apparatous.
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
Obstruction of LAD aa ….anteror or septal wall
Cirumflax aa…post.wall or lateral MI
RT CORONARY aa …inferior wall MI
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)
Cardiac-specific troponin T (cTnT) and cardiac-speciic troponin I (cTnI)
as CK may be elevated with skeletal muscle disease or trauma, including intramuscular injection
two serious complications of STEMI.
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.
Many aspects of the treatment of STEMI are initiated in the Emergency Department and then continued during the in-hospital phase of management
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.
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.
More important, there is evidence that intravenous beta blockers reduce the risks of reinfarction and ventricular fibrillation.
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.
The principal goal of fibrinolysis is prompt restoration of full coronary arterial patency.
Hemorrhage is the most frequent and potentially the most serious complication.
Factors that increase the work of the heart during the initial hours of infarction may increase the size of the infarct
, where the atmosphere of 24-h vigilance may interfere with the patient's sleep.
However, sedation is no substitute for:
reassuring,
quiet surroundings.
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.
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
(i .e., triple antiplatelet therapy)
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
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
(LMWH or UFH)
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
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
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.
Pump failure is now the primary cause of in-hospital death from STEMI….needs hemodynamic asst
clinical signs are pulmonary rales ,S3 & S4 gallop
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.