Blood leaks back into the chambers rather than flowing forward through the heart or into an artery. In the United States, backflow most often is due to prolapse. Prolapse is when the flaps of the valve flop or bulge back into an upper heart chamber during a heartbeat. Prolapse mainly affects the mitral valve.
NSTEMI is a shorthand medical term for non-ST segment elevation myocardial infarction. It is one type of myocardial infarction also called heart attack.
NSTEMI (NonâST-segment elevation myocardial infarction) and STEMI (ST-segment elevation myocardial infarction) are commonly known as heart attack. But they are different from each other in some extent. NSTEMI account for about 30% and STEMI about 70% of all heart attack (myocardial infarction).