Питання 30 з 39

A 7-week-old infant is brought to the pediatrician due to feeding difficulty for the last 4 days. She has been drinking very little breast milk and stops feeding as if she is tired, only to start sucking again after a few minutes. On chest auscultation, bilateral wheezing is present. A cardiac murmur starts immediately after the onset of the first heart sound (S1), reaching its maximal intensity at the end of systole, and vaning during late diastolsecong intercostal space and radiates to the left clavicle. The first heart sound (S1) is normal, while the second heart sound (S2) is obscured by the murmur. The pediatrician suspects a patent ductus arteriosus. Communication between which of the following arteries is the most likely cause of hemodynamic instability?

1. A Superior vena cava and aorta
2. B Aorta and pulmonary veins
3. C Pulmonary artery and aorta
4. D Pulmonary artery and pulmonary veins
5. E Superior vena cava and pulmonary artery

Правильна відповідь: C. Pulmonary artery and aorta