A 20-year-old male underwent an echocardiogram to assess chest pain.Results revealed a congenital defect in papillary muscles.Which of the following would the nurse expect to occur?
A) Closure of the semilunar valve
B) Backward expulsion of the atrioventricular valves
C) Closure of the atrioventricular valve
D) Backward expulsion of the semilunar valves

Question

Quizplus · Accepted Answer

The papillary muscles are extensions of the myocardium that pull the cusps together and downward at the onset of ventricular contraction,thus preventing their backward expulsion into the atria.
Defects in the papillary muscles would not affect the semilunar valve closure.
Defects in the papillary muscles do not affect the atrioventricular valves.
The papillary muscles prevent backward expulsion into the atria.They do not affect the semilunar valves.

A 20-Year-Old Male Underwent an Echocardiogram to Assess Chest Pain