Angina and myocardial infarction: what is the difference?

Myocardial infarction is the medical term for a heart attack. Angina can be a warning that the heart is not receiving enough oxygen-rich blood, but the two terms do not describe the same event.

Stable angina often follows a recognizable pattern, such as discomfort during exertion or emotional stress that settles with rest or prescribed medicine. A new pattern, symptoms at rest, or discomfort that is stronger or lasts longer can signal unstable angina or a heart attack and needs urgent assessment.

Doctors distinguish these problems using the symptom story, examination, an electrocardiogram and blood tests that can detect heart-muscle injury. Symptoms alone cannot reliably show whether damage has occurred.

Stop exertion and rest if chest pressure or tightness begins. If you have a personal angina action plan, follow it exactly and use only medicine prescribed for you. Do not drive yourself for assessment when symptoms suggest an emergency.

For recurring discomfort that has not changed, arrange a clinical review. Record what brought it on, where it travelled, how long it lasted and what relieved it; those details help guide testing and treatment.

Call the local emergency service now for new or severe chest pressure, discomfort occurring at rest, symptoms that do not settle promptly, or pain accompanied by breathlessness, sweating, nausea, faintness or unusual weakness. Discomfort may spread to an arm, shoulder, back, neck or jaw.

Treat a clear change from your usual angina pattern as urgent even if the sensation later eases. Emergency clinicians can begin monitoring and treatment during transport.

Ask which symptom changes should activate your emergency plan, whether you need an electrocardiogram or other testing, how to use prescribed chest-pain medicine, and which activity limits apply while your symptoms are being assessed.