Which of the following is most indicative of decreased left ventricular preload?
a. Increased PAOP/PAWP
b. Decreased PAOP/PAWP
c. Increased CVP
d. Decreased CVP
A
Pulmonary artery occlusion pressure (PAOP) and pulmonary artery wedge pressure (PAWP) normally reflect the pressure in the left ventricle at the end of diastole. Left ventricular end-diastolic pressure is preload, and so an increase in preload will first increase the PAOP and PCWP measurements. Although central venous pressure increases in severe cases of increased preload, it can increase for other reasons. The other changes are not associated with increased preload.
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