Myocardial infarction (MI) refers to tissue death (infarction) of the heart muscle (myocardium)<unk>  by ischaemia, the lack of oxygen delivery to myocardial tissue. It is a type of acute coronary syndrome, which describes a sudden or short-term change in symptoms related to blood flow to the heart. Unlike the other type of acute coronary syndrome, unstable angina, a myocardial infarction occurs when there is cell death, which can be estimated by measuring by a blood test for biomarkers (the cardiac protein troponin). When there is evidence of an MI, it may be classified as an ST elevation myocardial infarction (STEMI) or Non-ST elevation myocardial infarction (NSTEMI) based on the results of an ECG. The phrase "heart attack" is often used non-specifically to refer to myocardial infarction. An MI is different from—but can<unk> cardiac arrest, where the heart is not contracting at all or so poorly that all vital organs cease to function, thus might lead to death. It is also distinct from heart failure, in which the pumping action of the heart is impaired. However, an MI may lead to heart failure.
causes of Ventricular tachycardia
causes of Cardiac tamponade
types of Supraventricular tachycardia
risks of Atrial fibrillation
causes of Mitral valve stenosis
causes of Libman–Sacks endocarditis
symptom of Brugada syndrome
complications of Atrial fibrillation