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 defect (AVC)

Question

Quizplus · Accepted Answer

The continuous-machine type of murmur best heard at the left upper sternal border throughout systole and diastole, along with a bounding pulse and thrill, is characteristic of patent ductus arteriosus (PDA). PDA is a congenital heart defect where the ductus arteriosus, a fetal blood vessel that connects the aorta and the pulmonary artery, fails to close after birth.

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