Pediatric Nursing Q 190

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When creating a teaching program for the parents of Jessica who is diagnosed with pulmonic stenosis (PS), Nurse Alex would keep in mind that this disorder involves which of the following?

  

     A. A single vessel arising from both ventricles

     B. Obstruction of blood flow from the left ventricle

     C. Obstruction of blood flow from the right ventricle

     D. Return of blood to the heart without entry to the left atrium

    

    

Correct Answer: C. Obstruction of blood flow from the right ventricle.

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PS refers to an obstruction of blood flow from the right ventricle. Pulmonic stenosis is a defect of the pulmonic valve in which the valve is stiffened, causing an obstruction to flow. This disease is typically congenital, benign, and diagnosed in pediatric patients with potentially curative treatments.

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Option A: Truncus arteriosus involves a single vessel arising from both ventricles. Persistent truncus arteriosus (TA) is a rare, congenital, cyanotic heart defect characterized by a ventricular septal defect (VSD), a single truncal valve, and a common ventricular outflow tract (OT).

Option B: A physical exam may reveal multiple signs of pulmonic stenosis, depending on severity and practitioner skill. Cardiac examination may reveal a left parasternal heave, secondary to right ventricular hypertrophy. Auscultation at the left upper sternal border may reveal a systolic ejection murmur radiating to the back.

Option D: Total anomalous pulmonary venous communications involve the return of blood to the heart without entry into the left atrium and obstruction of blood flow from the left ventricle.

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