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Subjects/Physiology/Physiology
Physiology
medium
heart-pulse Physiology

Best index to measure cardiac afterload is:

A. Mean aerial pressure
B. LV end diastolic pressure
C. LV mean systolic pressure
D. Total peripheral resistance

Explanation

Ans: D. Total peripheral resistance(Ref: Ganong 25Ie p544, 24/e p546)Cardiac output depends on both preload & afterload.The preload is defined by the venous return & left ventricular end-diastolic volume while the afterload is defined by the mean aerial pressure, which then fither depends on total peripheral resistance.

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