Q:

The first heart sound corresponds in time with

safaTerkawi
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2022-08-07
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The first heart sound corresponds in time with.

  1. Closure of the aortic and pulmonary valves.
  2. The P wave of the electrocardiogram.
  3. A rise in atrial pressure.
  4. A rise in ventricular pressure.
  5. The A wave in central venous pressure.
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safaTerkawi
2022-08-07
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A. False  It is synchronous with mitral and tricuspid closure.

B. False  It corresponds with the QRS complex.

C. True  The mitral and tricuspid valves bulge back into the atria.

D. True  This closes the mitral and tricuspid valves.

E. False  It corresponds with the C wave; the A wave is due to atrial contraction which precedes the first heart sound.

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