Nitrates decrease myocardial oxygen consumption by all of the following mechanisms except -: (A) By increasing the left ventricular end diastolic pressure, (B) By direct reduction of oxygen consumption of the myocardial cell, (C) By dilation of the capacitance vessels, (D) By decreasing the size of hea
Answer is A. Ans. is 'a' i.e., By increasing the left ventricular end diastolic pressure o Nitratets dilate veins (capacitance) vessels and decrease venous return (preload)o This results in decreased end diastolic pressure and left ventricular size (not increased), which ultimately leads to decreased oxygen consumption.