Angina and ischemia: understanding the difference

The terms are related but not interchangeable. Myocardial ischemia describes what is happening in the heart, whereas angina describes the discomfort a person may feel. Ischemia can sometimes occur without obvious pain.

The heart needs a continuous supply of oxygen-rich blood. Narrowing or spasm in a coronary artery can leave supply unable to meet demand. Exertion, cold conditions, a heavy meal or emotional strain may increase demand and bring on angina in someone with coronary disease.

Angina often presents as pressure, tightness, heaviness or squeezing rather than a sharp pinpoint pain. It may be felt in the chest, arm, shoulder, neck, jaw or back and may occur with breathlessness or nausea. Because ischemia can be silent, clinicians also consider risk factors and test findings rather than relying only on pain.

Book a medical assessment for recurring discomfort brought on by activity and relieved by rest, even if episodes are mild. Note the trigger, location, sensation, duration and associated symptoms. An electrocardiogram records the heart's electrical activity, but the wider assessment may also involve examination, blood tests or other heart investigations.

Treatment is tailored to the cause and may include medicine to relieve episodes, reduce the heart's workload, prevent clots or lower cholesterol. Avoid tobacco, take prescribed medicine consistently and discuss suitable activity. Do not borrow another person's angina medicine or change doses without clinical instructions.

Call UAE emergency services for new, severe or persistent chest pressure; discomfort that begins at rest; or symptoms accompanied by marked breathlessness, fainting, cold sweat, nausea or pain spreading to the jaw, arm or back. These features can reflect an acute interruption of heart blood flow.

A change from an established angina pattern is also urgent. Seek prompt help if episodes become more frequent, last longer, feel stronger or start with less exertion. Follow any prescribed angina action plan while waiting, and do not drive yourself to hospital.

Ask whether your symptom pattern suggests stable angina, what each planned test can show, and how to respond to another episode. Clarify activity limits, medicine timing, side effects, blood-pressure and cholesterol goals, and whether family members should know your emergency plan.