Chemicals used in chemical stress test,”Adenosine and dipyrdiamole cause coronary vasodilation. Diseased coronary aa are already maximally dilated so they will receive less blood flow with the entire system is vasodilated. Dobutamine increases myocardial oxygen demand by increasing HR

Chemicals used in chemical stress test,”Adenosine and dipyrdiamole cause coronary vasodilation. Diseased coronary aa are already maximally dilated so they will receive less blood flow with the entire system is vasodilated. Dobutamine increases myocardial oxygen demand by increasing HR

BP and cardiac contractility”