Following several weeks of increasing fatigue and a subsequent diagnostic workup, a client has been diagnosed with mitral valve regurgitation. Failure of this heart valve would have which of the following consequences?
A) Backup of blood from the right atrium into the superior vena cava
B) Backflow from the right ventricle to the right atrium during systole
C) Inhibition of the SA node's normal action potential
D) Backflow from the left ventricle to the left atrium
Ans: D
Feedback:
The mitral valve separates the left ventricle from the left atrium; failure of this valve would cause backflow from the former to the latter during systole. Valve function does not directly affect cardiac contractility.
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