Author Question: A 22-year-old pregnant woman presents to her OB/GYN for a prenatal checkup. The fetal heart-beat ... (Read 140 times)

robinn137 · **on:** Jun 25, 2018

A 22-year-old pregnant woman presents to her OB/GYN for a prenatal checkup. The fetal heart-beat sounds irregular, and a fetal echocardiogram reveals an atrioventricular canal (AVC) defect. This defect is the result of:

a. failure of the ductus arteriosus to close.
b. incomple fusion of the endocardial cush-ions.
c. a patent foramen ovale.
d. a right-to-left shunt.

Question 2

An 8-week-old infant's well-baby check reveals a murmur, and an echocardiogram shows a large ventricular septal defect. If left untreated, what condition could develop?

a. Pulmonary hypertension
b. Cyanosis
c. Dysrhythmias
d. Valve damage

meryzewe · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

ANS: B
AVC defect is the result of incomplete fusion of endocardial cushions. A patent ductus is the failure of the ductus arteriosus to close. The infant will not experience a patent foramen ovale. Flow is generally left to right, not right to left.

Answer to Question 2

ANS: A
If the degree of shunting is significant and not corrected, the child is at risk for developing pul-monary hypertension. Cyanosis is not present at first if the shift is left to right. Dysrhythmias do not occur. The defect does not lead to valve damage.