CPAP and PEEP cause left ventricular preload to ____________ , and left ventricular afterload to ____________
A. decrease; increase
B. increase; decrease
C. decrease; decrease
D. increase; increase
ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: CPAP and PEEP are associated with a decreased left ventricular preload and afterload. Consistent with these mechanisms, CPAP has been used to treat cardiogenic (high-pressure) pulmonary edema caused by left ventricular failure.
D. Incorrect response: See explanation C.
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