Massive congenital coronary arteriovenous malformation presenting with exertional dyspnea and desaturation in an adult: a case report and review of the literature.

A coronary arteriovenous fistula is a congenital or acquired coronary artery anomaly in which blood is shunted into a cardiac chamber, great vessel or other structure, superceding the myocardial capillary network. The clinical presentation may be heralded by the development of dyspnea, congestive heart failure, angina, endocarditis, dysrhythmias or myocardial infarction. The authors describe a left to right coronary artery to coronary sinus …