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ANGINA PECTORIS
AKSHAY AGRAWAL
1.Defination2.Epidemiology3.Classification4.Etiology5.Pathophysiology6.Clinical Features7.Risk factors8.Diagnosis9.Treatment
Angina is the symptom complex caused
by transient myocardial ischaemia
and is a clinical syndrome rather
than a disease.
Definition
It may occur whenever
there is an imbalance
between myocardial oxygen
supply and demand
Epidemiology
Occurs in both men and women of any age but
commonly middle age and older adults.
Classification
1. Stable or typical Angina
2. Prinzmetal’s Variant Angina
3. Unstable Angina
4. Microvascular Angina
Etiology
Atherosclerosis
Coronary artery spasm
Use of cocaine
Blockage of coronary artery by blood clot or compression
Inflammation or infection of coronary artery
Injury to coronary artery
Poor functioning of tiny blood vessels
Pathophysiology
Myocardial ischemia results from imbalance between
myocardial energy supply(oxygen and energy substrates
like glucose and free fatty acids)and myocardial oxygen
demand.
Or a fixed reduction in the diameter of the
coronary arteries by at least 70% leads to reduction
in coronary blood flow.
Inability to increase oxygen extraction or
coronary blood flow, together with elevated
myocardial demand, leads to angina.
Clinical Features
Pain - over sternum and spreads
down the left arm
also to backsides , upper abdomen,
neck , jaw or even teeth.
Type –dull ache , heaviness or
a crushing sensation .
Breathlessness
Chest Discomfort
Nausea
Fatigue
Dizziness
Profuse sweating
Anxiety
Investigations
Resting ECG – Usually normal but during pain there
will be elevation or depression of ST segment with
or without T wave inversion.
Exercise ECG - >1mm of flat or down sloping ST
depression .
Coronary Angiogram
Blood Test – Increased cardiac enzymes
like Troponin
Risk Factors
Physical Exertion
Cold exposure
Intense emotions
Heavy meals
Hypertension
Diabetes mellitus
Smoking
Left ventricular dysfunction
Obesity
Arterial disease – Peripheral vascular diseases
Anaemia
Thyrotoxicosis
Treatment
A . Medical
Antiplatelet therapy –Aspirin , clopidogrel Reduces risk of MI
Antianginal drug therapy –
Nitrates – glyceryl trinitrates , isosorbide mononitrate
Beta blockers – metaprolol ,atenolol
Calcium channel blockers – nifidipine ,amlodipine
Potassium channel activators – nicorandil
B. Surgical
Percutaneous Coronary Intervention
Coronary Artery Bypass Grafting
C. General measures
Do not smoke
Reduce overweight
Regular exercise
Avoid severe exertion after heavy mealor in very cold
weather
Reference
Textbook of Pathology by Harshmohan – sixth
edition 2010
Davidson’s Principles and practice of Medicine
by Brain R Walker
Nicki R . Colledge – 21st edition 2010
THANK YOU