How doctors came to understand it
In 1912 Chicago physician James Herrick showed that people could survive a sudden coronary blockage, overturning the belief that a heart attack meant instant death. The electrocardiogram entered diagnosis in the 1920s, coronary care units arrived in the early 1960s, and in 1980 Marcus DeWood's angiography studies proved that a clot was the culprit. Clot-busting drugs (the 1986 GISSI trial), then balloon angioplasty and stents, cut in-hospital death rates from around 30% to about 5%. Today diagnosis follows the 2018 Fourth Universal Definition, combining troponin blood tests with symptoms and ECG findings.
Warning signs—and how it differs from angina
The classic sign is pressure, squeezing, or fullness in the center of the chest lasting more than a few minutes, often spreading to the left arm, jaw, or back, with cold sweats and shortness of breath. Women, older adults, and people with diabetes may only feel nausea, unusual fatigue, or breathlessness. Angina is a temporary oxygen shortage from a narrowed artery that eases with rest; a heart attack is a blockage that doesn't. The underlying cause is almost always atherosclerosis, driven by high blood pressure, smoking, and LDL cholesterol.
What to do and how it's treated
Call 911 right away—don't drive yourself. Heart muscle starts dying within minutes, and the damage becomes permanent over a few hours, hence the mantra "time is muscle." At the hospital, doctors open the artery with emergency angioplasty and a stent, or give clot-busting drugs if a cath lab isn't close. Afterward, aspirin and other antiplatelets, statins, and beta-blockers, plus quitting smoking and cardiac rehab, lower the risk of a repeat attack and heart failure.
This article is general health information and is not a substitute for diagnosis or treatment. If symptoms persist, see a doctor.
FAQ
- Should I take aspirin?
- If you aren't allergic or at high bleeding risk, the 911 dispatcher may tell you to chew a regular aspirin.
- Can young people have heart attacks?
- Yes—smoking, family history, and high cholesterol can cause them in people in their 30s and 40s.
Sources reviewed: 2026-10-26
References
- Thygesen, K., et al. (2018). Fourth universal definition of myocardial infarction. Circulation, 138(20), e618–e651.
- Byrne, R. A., et al. (2023). 2023 ESC Guidelines for the management of acute coronary syndromes. European Heart Journal, 44(38), 3720–3826.
- Herrick, J. B. (1912). Clinical features of sudden obstruction of the coronary arteries. JAMA, 59(23), 2015–2020.