Nokea
What is accurate about the characteristics of high-density lipoproteins (HDLs)?
- A. They have high amounts of triglycerides.
- B. They have only small amounts of protein.
- C. They have little cholesterol.
- D. They aid in steroid production.
Correct Answer: C
Rationale: HDLs have low triglycerides, high protein content, low cholesterol, and are excreted via the liver, not involved in steroid production.
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Which comment made by a parent of a 1-month-old infant would alert the nurse about the presence of a congenital heart defect?
- A. He is always hungry.'
- B. He tires out during feedings.'
- C. He is fussy for several hours every day.'
- D. He sleeps all the time.'
Correct Answer: B
Rationale: Fatigue during feedings is a common sign of congenital heart defects due to increased cardiac workload.
Which assessment would lead the nurse to suspect that a newborn infant has a ventricular septal defect?
- A. A loud, harsh murmur with a systolic thrill
- B. Cyanosis when crying
- C. Blood pressure higher in the arms than in the legs
- D. A machinery-like murmur
Correct Answer: A
Rationale: A loud, harsh murmur with a systolic thrill is a hallmark sign of a ventricular septal defect in newborns.
What does the nurse understand regarding why dyspnea occurs?
- A. Blood is circulated through the lungs again, causing pulmonary circulatory congestion.
- B. Blood is shunted past the pulmonary circulation, causing pulmonary hypoxia.
- C. Blood is shunted past cardiac arteries, causing myocardial hypoxia.
- D. Blood is circulated through the ductus from the pulmonary artery to the aorta, bypassing the left side of the heart.
Correct Answer: A
Rationale: In patent ductus arteriosus, oxygenated blood recycles through the lungs, causing pulmonary congestion and dyspnea.
Which congenital cardiac defect(s) cause(s) increased pulmonary blood flow?
- A. Atrial septal defects (ASDs)
- B. Tetralogy of Fallot
- C. Dextroposition of aorta
- D. Patent ductus arteriosus
- E. Ventricular septal defects (VSDs)
Correct Answer: A,D,E
Rationale: ASDs, patent ductus arteriosus, and VSDs cause increased pulmonary blood flow due to left-to-right shunting.
Which areas of the heart are affected by carditis?
- A. Coronary arteries
- B. Heart muscle and the mitral valve
- C. Aortic and pulmonic valves
- D. Contractility of the ventricles
Correct Answer: B
Rationale: Rheumatic fever carditis affects the heart muscle and commonly the mitral valve, causing inflammation and potential damage.