The effect of revascularization, based on regional and total myocardial contraction
parameters, is usually already evident on the operating table, which is very important in patients with pronounced, but reversible ischemic myocardial dysfunction.
But if the intensity stimulant achieve liminal value, myocardial contraction
is maximal, that is the strongest contraction that may cause myocardium in those conditions.
Phytochemical studies investigating Rhodiola species of the Crassulaceae family have found that the main bioactive compounds, salidroside and tyrosol, have cardiovascular specific pharmacological effects such as enhancing myocardial contractibility, increasing myocardial contraction
and inducing hypotension.
Digoxin has a positive inotropic effect, shifts the Frank-Starling curve upward and leftward, and results in greater stroke volume generation for a given myocardial contraction
,  achieved through altered balance in the handling of intracellular [Na.