Which of the following physiologic effects is associated with the Valsalva maneuver?
A. increased right ventricular preload
B. decreased left ventricular afterload
C. increased cardiac output
D. increased venous return
?ANS: B
A. Incorrect response: Venous return to the right side of the heart decreases. Consequently, right ventricular preload decreases.
B. Correct response: A Valsalva maneuver involves performing an expiratory maneuver against a closed glottis. During a Valsalva maneuver, the pleural pressure increases, and the left ventricular afterload decreases.
C. Incorrect response: Because venous return to the heart decreases during a Valsalva maneuver, the cardiac output decreases.
D. Incorrect response: Because of the high pleural pressure that develops, venous return to the left ventricle decreases when a Valsalva maneuver is performed.
You might also like to view...
________ The polio vaccine has been available since 1955, which has resulted in the disappearance of the disease in the United States
Indicate whether the statement is true or false
At what age should infants respond to the instruction "No" and quickly turn to the sound of their name?
A. 1 month of age B. 2 to 4 months of age C. 4 to 8 months of age D. 8 to 12 months of age E. 12 to 18 months of age
How many deaths each year in the U.S. are attributed to tobacco usage?
A) 1 in 2 B) 1 in 3 C) 1 in 4 D) 1 in 5
Which of the following describes the Concurrent category of quality assessment?
A. Measures quality beforehand; data are collected based on predetermined measures or objectives B. Entails making a decision about quality of care that has already been delivered. C. Analyzes quality of care as it is being provided D. None of the above