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 brainstem is the respiratory rhythm generator. It is involved in involuntary breathing. Within the brainstem, the ventral respiratory group and the dorsal respirator â¦ y group are responsible for generating breathing rhythm and the pontine respiratory group regulates the pattern of that rhythm.