An infant has a continuous-machine type of murmur best heard at the left upper sternal border throughout systole and diastole.The infant has a bounding pulse and a thrill on palpation.These clinical findings are consistent with which congenital heart defect?
A)Atrial septal defect (ASD)
B)Ventricular septal defect (VSD)
C)Patent ductus arteriosus (PDA)
D)Atrioventricular canal (AVC) defect

Question

Quizplus · Accepted Answer

If pulmonary vascular resistance has fallen, infants with PDA will characteristically have a continuous-machinery-type murmur heard best at the left upper sternal border throughout systole and diastole. If the PDA is significant, the infant also will have bounding pulses, an active precordium, a thrill upon palpation, and signs and symptoms of pulmonary overcirculation. Infants with a small PDA usually remain asymptomatic.

An Infant Has a Continuous-Machine Type of Murmur Best Heard