A heart attack, also known as myocardial infarction, occurs when blood flow to a part of the heart is blocked for a long enough time that part of the heart muscle is damaged or dies. This blockage is most often caused by a buildup of fat, cholesterol, and other substances in the coronary arteries, forming plaques that rupture and cause blood clots. Prompt emergency treatment is critical to restore blood flow and reduce heart damage.
Causes & Risk Factors Coronary artery disease (atherosclerosis) is the leading cause
Coronary artery spasm or tear (e.g., spontaneous coronary artery dissection)
High blood pressure, diabetes, obesity, smoking
High cholesterol and triglyceride levels
Family history of heart disease
Sedentary lifestyle, poor diet, excessive alcohol use
Stress and age
Symptoms Chest pain or discomfort (pressure, squeezing, heaviness)
Pain radiating to arms, neck, jaw, back, or stomach
Shortness of breath, difficulty breathing
Cold sweat, nausea, vomiting
Lightheadedness, dizziness, or fainting
Sudden fatigue or anxiety Symptoms may vary, and some heart attacks may present quietly, especially in women and diabetics.
Diagnosis & Treatment Diagnosis includes ECG, blood tests (troponin), and imaging.
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