A 7-year-old boy with Down syndrome underwent surgery to rep…

A 7-year-old boy with Down syndrome underwent surgery to repair a congenital ventricular septal defect. During this procedure, iatrogenic injury to the coronary artery supplying the conduction system of the heart, including the sinuatrial (SA) and atrioventricular (AV) nodes, occurred, resulting in a heart block. What artery was most likely damaged by the surgeon?

A 54-year-old high school teacher has been diagnosed with co…

A 54-year-old high school teacher has been diagnosed with coronary artery disease and is going to undergo coronary bypass surgery. During the surgery, the thoracic surgeon decides to use the internal thoracic artery for one of the bypasses. Which of the following arteries gives rise to the internal thoracic artery?

A newborn baby is readmitted to the hospital with hypoxia an…

A newborn baby is readmitted to the hospital with hypoxia and upon testing is found to have pulmonary stenosis, transposition of the aorta, interventricular septal defect, and hypertrophy of the right ventricle. Which of the following is best described by these symptoms?