Steal Phenomenon: "It is a type of blood circulation occurs, in this case, occurs in myocardium, if there is ischaemia anywhere in any organ, blood from ischemic area is taken away from ischemic area to normal area of that organ (myocardium) & ischemic area suffers this phenomenon is known as Steal Phenomenon, in this case, Coronary Steal" Myocardial Blood Flow: Global measures, in this case, the flow may mask an intramyocardial "STEAL" Phenomenon in which dilatation of normal vascular bed diverts blood away from other beds chat are ischemic & thus maximally dilated. Nitroprusside a potent systemic vasodilator, has been implicated in causing coronary steal by dilating coronary arteriolar resistance vessels.
In contrast, Nitroglycerin dilates venous circulation, epicardial coronary vessels, and large myocardial collateral vessels & is not known to be associated with the Steal…
