Coronary Artery Thrombosis in a Neonate With Critical Aortic Stenosis

We describe a case of right coronary artery occlusion in a neonate with critical aortic stenosis. We hypothesize that the thrombus was either formed in situ resulting from low cardiac output or secondary to an atrial arrhythmia in the presence of severe left ventricular diastolic dysfunction that may have occurred during air-transfer to our facility. We conclude that attention should be given to the coronary arteries in low-flow critical aortic stenosis, particularly in neonates and infants whose stroke volume is extremely low.