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.
For this reason its often called a âCODE STEMIâ or a âSTEMI alert.â STEMI stands for ST elevation myocardial infarction. âST elevationâ refers to a particular pattern on an EKG heart tracing and âmyocardial infarctionâ is the medical term for a heart attack. So STEMI is basically a heart attack with a particular EKG heart-tracing pattern.