peripheral arteriolar vasodilatation - leads to a reduction in peripheral resistance and hence a reduction in blood pressure
peripheral venous dilatation - leads to peripheral venous pooling and hence a reduction in left ventricular end-diastolic pressure, and reduction in resistance to coronary blood flow during diastole
vasodilatory effects may cause redistribution of blood flow to areas of myocardial ischaemia. This mechanism is important when angina is a result of coronary artery spasm (Prinzmetal's angina)
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