Myocardial infarction is the death of the heart muscle, which develops due to partial or complete blockage of the coronary blood vessels. The cause of the occlusion of the coronary arteries, which supply the heart as a muscle, with nutrients and oxygen is atherosclerosis. Risk factors that promote coronary heart disease are: obesity, high blood pressure, diabetes, elevated cholesterol and triglyceride levels in the blood, smoking, consuming alcohol in large quantities. Symptoms of myocardial infarction are: severe chest pain spreading to the neck and lower jaw, both arms and back, nausea, discomfort, sweating. The diagnosis of myocardial infarction is based on the changes that occur on the electrocardiographic record (ECG), symptoms and on the basis of the clinical picture. The risk in a heart attack is the occurrence of a sudden malignant cardiac arrhythmia or sudden death. Myocardial infarction is treated with drugs that dissolve the clot (fibrinolytics), re-opening of the coronary artery with a stent (coronary angiography) or heart surgery (bypass). Patients' lifestyles should be aimed ar quitting smoking and eating healthy. In the beginning, after a myocardial infarction, it is necessary to avoid physical exertion. It is extremely important to take medication as recommended by a cardiologist. Acetylsalicylic acid prevents a new heart attack