Preload measures?
Correct Answer: End diastolic volume
Description: ANSWER: (B) End diastolic volumeREF: Guytons physiology 22nd edition page 111, http://en.wikipedia.org/wiki/Preload_% 28cardiology%29"For cardiac contraction, the preload is usually considered to be the end-diastolic pressure when the ventricle has become filled"Quantitatively, preload can be calculated asLV EDT . LV EDR2hWhere LVEDP = Left ventricular end diastolic pressure, LVEDR = Left ventricular end diastolic radius (at the ventricle s midpoint), and h = thickness of the ventricle. This calculation is based on the Law of Laplace.
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