Understanding Angina: Causes, Types and Management
Angina is chest discomfort that occurs when the heart muscle is not receiving as much oxygen-rich blood as it needs. It is a symptom rather than a disease in itself, and it is one of the most important warning signals in cardiology.
What it feels like
Angina is usually felt as pressure, heaviness or tightness across the centre of the chest. It may spread to the arms, jaw, neck or back. Some people describe breathlessness or fatigue rather than pain.
The pattern matters as much as the sensation. Classic angina appears predictably with exertion — climbing stairs, walking uphill, carrying weight — or with emotional stress, and settles within minutes of rest.
Stable and unstable angina
Stable angina follows a predictable pattern: a similar level of exertion brings it on, and rest relieves it. It reflects a fixed narrowing that limits blood flow when demand rises.
Unstable angina is different and far more urgent. It occurs at rest, wakes a person from sleep, is more severe, lasts longer, or is newly worsening. This suggests an unstable situation in the artery and requires emergency assessment.
How angina is assessed
Assessment usually begins with a clinical history, ECG and blood tests, followed as appropriate by an echocardiogram, treadmill testing, CT coronary angiography or invasive coronary angiography.
The aim is to establish whether coronary narrowing is present, how severe it is, and how much heart muscle is at risk.
How angina is managed
Management has two goals: relieving symptoms and reducing the risk of a future heart attack. That typically combines medication, control of blood pressure, cholesterol and diabetes, stopping smoking, and appropriate physical activity.
Where symptoms persist despite medication, or where the pattern of disease warrants it, angioplasty or bypass surgery may be considered. The right choice depends on the individual.
Frequently asked questions
Is angina the same as a heart attack?
No. Angina is a warning that the heart is not receiving enough blood, usually temporary and relieved by rest. A heart attack involves sustained blockage and permanent muscle damage. Angina that changes pattern can precede a heart attack.
Can angina be managed without a stent?
Yes, in many cases. Medication together with risk-factor control is effective for a substantial proportion of people with stable angina. The decision is individual.
Should I stop exercising if I have angina?
Not necessarily, but activity should be guided by your cardiologist. Appropriate, graded exercise is usually beneficial. Any new or worsening symptom during activity should be reported.
When does angina become an emergency?
When it occurs at rest, is more severe than usual, lasts longer, or is not relieved by rest. This requires immediate assessment.
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