The emergency medicines for heart attack include nitroglycerin, aspirin, anticoagulant drugs and thrombolytic drugs such as streptokinase and urokinase, which are often used in combination when acute heart attack occurs. 1. Nitroglycerin: by dilating the coronary arteries and increasing the blood flow in the coronary arteries, it can be taken under the tongue, and it can be used as the emergency medicine at home. Note that patients with significant hypotension (systolic blood pressure below 90mmHg), severe anemia, glaucoma, increased intracranial pressure and nitroglycerin allergy can not be taken. 2. Aspirin: Aspirin is the cornerstone of antiplatelet therapy. In patients with aspirin intolerance, clopidogrel may be considered as an alternative. Unless contraindicated, all patients should receive anticoagulation therapy on an antiplatelet basis. Commonly used anticoagulants include common heparin and bivalirudin. All kinds of severe active, malignant hypertension, liver and renal function severe failure patients are prohibited. 3. Thrombolytic drugs: including streptokinase, urokinase, etc., the effect is better if injected intravenously within 12h after the onset of disease. Only for ST-segment elevation myocardial infarction. Acute myocardial infarction is a very dangerous heart disease, the situation is complex, once diagnosed with acute infarction, should be quickly to the hospital for treatment, so as not to delay the condition.