The document discusses coronary artery anatomy and techniques for assessing myocardial viability. It provides details on:
1. The origins, branches and distributions of the right and left coronary arteries.
2. Imaging modalities for evaluating myocardial viability including dobutamine stress echocardiography, nuclear techniques using thallium/technetium and FDG PET, and cardiac MRI with late gadolinium enhancement.
3. The interpretation of these tests to determine viability, with areas of uptake on nuclear imaging over 50% or absence of late gadolinium enhancement on MRI suggesting viable myocardium.
A detailed description of ct coronary angiography and calcium scoring with various aspects regarding the preparation, procedure, limitations and a short review regarding post CABG imaging.
A detailed description of ct coronary angiography and calcium scoring with various aspects regarding the preparation, procedure, limitations and a short review regarding post CABG imaging.
Definition of LVA Centerline analysis of RWMA on LV angio in 30º RAO shows hypocontractile segments moving more than 2 standard deviations out of normal range.
Definition of LVA Centerline analysis of RWMA on LV angio in 30º RAO shows hypocontractile segments moving more than 2 standard deviations out of normal range.
Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
3. Coronary artery
The coronary artery arises just
superior to the aortic valve and
supply the heart
The aortic valve has three cusps –
left coronary (LC),
right coronary (RC)
posterior non-coronary (NC) cusps.
3
4. Right coronary artery
Originates from right
coronary sinus of Valsalva
Courses through the right
AV groove between the
right atrium and right
ventricle to the inferior part
of the septum
4
5. Branches of RCA
Conus artery
Sinu nodal artery
Right coronary artery
Conus branch
SINU NODAL BRANCH
5
AV NODAL ARTERY
6. Conus branch – 1st branch supplies the RVOT
Sinus node artery – 2nd branch - SA node.(in 40%
they originate from LCA)
Acute marginal arteries-Arise at acute angle and
runs along the margin of the right ventricle above
the diaphragm.
Branch to AV node
Posterior descending artery : Supply lower part of
the ventricular septum & adjacent ventricular walls.
Arises from RCA in 85% of case.
6
7. The right coronary artery. Course of
the right coronary artery (RCA)
on a series of axial images
acquired from top to bottom (A-
F). (A-C) The aorta gives rise to
the proximal segment (1), which
courses in an anterolateral
direction. (D) The middle
segment of the RCA takes a
nearly vertical downward
course (2). (E) The RCA then
turns to the left and continues to
the posterior aspect of the heart
(segment 3) along a nearly
horizontal course on the
diaphragmatic surface of the
heart. (F) At the crux of the
heart—the junction of the septa
and walls of the four heart
chambers—the RCA branches
into the posterior descending
artery and right posterolateral
branch (4). Ao, aorta; RV, right
ventricle; LV, left ventricle; LA,
left atrium.
8. Area of distribution
8
RT CORONARY ARTERY----
1)Right atrium
2)Ventricles
i) greater part of Rt. Ventricle
ii) a small part of the Lt ventricle
adjoining posterior IV groove.
3)Posterior part of the IV septum
4)Whole of the conducting system of the heart, except part
of the left br of AV bundle
9. Left coronary artery
Arises from left coronary
cusps
Travels between RVOT
anteriorly and left atrium
posteriorly.
Almost immediately
bifurcate into left anterior
descending and left
circumflex artery.
9
11. The left anterior descending coronary artery. Course of the left anterior descending
coronary artery (LAD) on a series of axial images acquired from top to bottom (A-
H). (A) The aorta gives rise to the left main coronary artery (5), which gives off the
proximal segment (6) of the LAD anteriorly. (B-C) Along its further course, the
artery divides into the middle LAD segment (7) and a diagonal branch (9). (D) In
most individuals, there is a second branching of the LAD. A second diagonal branch
(10) arises from the distal segment (8). (E-H) The distal parts of the LAD can be
followed as they course in the interventricular groove toward the apex. Note that
the diagonal branches may occasionally be larger than the main LAD. Ao, aorta; RV,
right ventricle; LV, left ventricle; LA, left atrium.
12. The left circumflex coronary artery. Course of the left circumflex coronary artery (LCX) on a series of
axial images acquired from top to bottom (A-H). (A) The aorta gives rise to the left main coronary
artery (5), which gives of the proximal segment (11) of the LCX posteriorly. (B-D) Along its further
course, the artery divides into the middle segment of the LCX (13) and a marginal branch (12). (E-
H) The middle segment (13) then gives off a second marginal branch (14). The circumflex branch
turns around the left border and continues on the diaphragmatic surface (distal segment, 15).
Ao, aorta; LA, left atrium; arrow, segment 12
14. Area of Distribution
14
1) Left atrium.
2) Ventricles
i) Greater part of the left ventricle, except the area
adjoining the posterior IV groove.
ii) A small part of the right ventricle adjoining the
anterior IV groove.
3) Anterior part of the IV septum.
4) A part of the left bundle branch of the AV
bundle.
15. DOMINANCE
15
Dominance is described by which coronary
artery branch gives off the posterior
descending artery and supplies the inferior
wall, and is characterized as left, right, or
codominant
18. CT CORONARY ANGIOGRAPHY
18
Coronary computed tomography angiography
(CCTA) is an effective noninvasive method to image
the coronary arteries
MDCT has multiple detector rows which are placed
opposite the x-ray tube which shortens the
examination time and improves the temporal
resolution
19. INDICATION
Screening high risk patients
Evaluation of chest pain with low or moderate
probablity of coronary artery disease
Non invasive evaluation of coronary artery
anamolies
Post CABG
Post stent
32
20. CONTRAINDICATIONS
Absolute contraindication :
1. Hypersensitivity to iodinated contrast agent
2. Pregnancy
Relative contraindication
Irregular rhythm
Renal insufficiency (sr. creatinine > 1.5 mg/ml)
Hyperthyroidism
Inability to hold breath for 10 sec
History of allergy to other medication
Metallic interference (e,g: pacemaker, defibrillator wires) 33
21. PATIENT PREPARATION
21
Avoid caffeine and smoking 12 hours prior to the
procedure to avoid cardiac stimulation.
B- blocker : Oral or I.V B-blocker is used in patient with
heart rate greater than 65 bpm
oral 50- 100 mg metaprolol administered 45 min to 1
hr before procedure.
or I.V Metaprolol 5 to 20 mg at the time of procedure
Sublingual Nitrates or Nitroglycerine: can be given
immediately before the procedure to dilated the
coronary arteries.
22. Volume and rate of contrast
administration
22
Using 64 detector MDCT technology:
80ml of contrast agent is injected at 6 ml/sec
f/b 40ml saline solution at 4ml/sec
.
23. After contrast administration, CT is obtained in
single breath-hold
Scan volume covers the entire heart from the
proximal ascending aorta (approximately 1–2 cm
below the carina) to the diaphragmatic surface of
the heart
23
25. CAD-RADS is the Coronary Artery Disease-Reporting and Data
System.
CAD-RADS is developed to standardize reporting of coronary
CTA, to improve communication and to guide therapy.
In 2022 CAD RADS was updated to version 2.0
26.
27. In CAD RADS 2.0 there are modifiers that can be added to
the Cad-Rads category:
N: indicates that a study is non-diagnostic
HRP: high-risk plaque (replaces V-vulnerable plaque)
I: ischemia
S: presence of stents
G: coronary artery bypass grafts
E: exceptions
28. Example of a non-diagnostic scan. Both the RCA and LCX are blurred due to
motion artifacts, resulting in CAD RADS N.
36. ⦿ Refers to cardiac muscle that is alive
• presence of cellular, metabolic, and microscopic contractile
function
⦿Two basic mechanisms of reversible ischemic
dysfunction
• myocardial stunning
• myocardial hibernation
37. ⦿Prolonged post-ischemic ventricular dysfunction that
occurs after brief episodes of non-lethal ischemia
⦿Transient LV dysfunction commonly observed following
an acute myocardial infarction treated with prompt
reperfusion.
38. ⦿Myocardium downregulates its contractile function in
the presence of sustained reduced blood flow.
⦿Cardiac myocytes are depleted of their contractile
material and filled with glycogen (PAS-positive
staining)
39. IMAGING VIABLE MYOCARDIUM
o Dobutamine stress echocardiography
o SPECT(Thallium/ technetium)
o 18 FDG PET
o CMR
40. Echocardiography
To asess Resting LV size and function
⦿LV wall thinning is a marker for scarring
⦿LV end-diastolic wall thickness (EDWT) of <6 mm
indicates non viable myocardium
41. Dobutamine stress Echocardiography
o To assess Contractile Reserve
o dobutamine infusion started at 2.5
μg/kg/min, with gradual increase to 5, 7.5, 10
μg/kg/min.
42.
43. NUCLEAR TECHNIQUES
X It utilizes radionuclide-labeled tracers to assess
myocyte integrity and function by measuring regional
tracer concentration in the myocardium.
o Thallium Membrane function
o Tc-99 membrane & mitochondia function
o FDG Glucose Metabolism
o Fatty acid Fatty acid Metabolism
44. Tc 99
Tc 99 labeled radiotracers are taken up by myocytes
across mitochondrial membranes.
The initial uptake and retention of these tracers reflect
cell membrane integrity and mitochondrial function
and thus indicate viability.
46. 18 FDG PET
PET Imaging for viability involves a combination of
Myocardial Perfusion + Metabolic Imaging
N13 Ammonia 18 F-FDG
• Uptake indicates presence Uptake indicates
of blood supply Metabollicaly active cell
49. CARDIAC MRI
Gadolinium based contrast agents are administered at
0.1mmol/kg patient weight and images are taken 10
mins after the injection to demonstrate LATE
GADOLINIUM ENHANCEMENT(LGE).
50. RAPID WASHOUT
NO LATE ENHANCEMENT Retention of Gadolinium in Extra
cellular space causing
LATE GADOLINIUM ENHANCEMENT
51.
52. o LGE =100 % of Ventricle wall thickness s/o Transmural infarct
o LGE > 50% of Ventricle wall thickness s/o Non viable
myocardium
o LGE <50% of Ventricle wall thickness suggests viability