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.
The treatment of NSTEMI is identical to the treatment of unstable angina. Fundamentally, the first step in treating NSTEMI is to stabilize the heart muscle to prevent further damage. This can usually be accomplished by administering oxygen, morphine, beta blockers, aspirin, Plavix, and a statin drug.