Which of the following is not true regarding a heart murmur?
a. can be heard with a stethoscope
b. may be caused by a stenotic valve
c. may be caused by an incompetent
d. may be caused by a bundle block

The answer is D may be caused by a bundel block

Explanation:

Cardiac murmurs are present when there is an alteration of the laminal blood flow at the valvular level, which produces a turbulence at the moment of the passage of blood through them, the most frequent causes are stenosis and valvular prolapse. this is why the bundle blocks are not the cause of them.

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explanation:

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