Blood flow in the vessels supplying the subendocardial poion of left ventricle occurs during:September 2009

Ans. B: DiastoleThe pressure inside the left ventricle is slightly higher than in the aoa during systole and hence blood flow in the vessels supplying the subendocardial poion of left ventricle occurs during diastole. On the other hand, the pressure difference between the right ventricle and aoa and the differential between the aoa and the right atria are somewhat greater during systole than during diastole so blood flow in these pas of the hea is not appreciably reduced during systole.