<unk>  <unk>  refers to tissue death (infarction) of the heart muscle (myocardium) caused by ischaemia, the lack of oxygen delivery to<unk>  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<unk>  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<unk> , it may be classified as an ST elevation<unk>  (STEMI) or Non-ST elevation<unk>  (NSTEMI) based on the results of an ECG. The phrase "heart attack" is often used non-specifically to refer to<unk> . An<unk>  is different from—but can cause—cardiac arrest, where the heart is not contracting at all or so poorly that all vital organs cease to function, thus<unk> ght lead to death. It is also distinct from heart failure, in which the pumping action of the heart is<unk> paired. However, an<unk>  may lead to heart failure.
Myocardial infarction
Heartburn
Carditis
Pericarditis
Limb infarction
Pleurisy
Lung infarction
Costochondritis