Coronary Artery-to-Superior Vena Cava Fistula: Contemporary Role of Phonocardiography in Diagnosis

• An uncommon case of coronary artery–to–SVC fistula is described. • Knowledge of the associated physical examination with TTE findings aids diagnosis. • New POCUS systems with microphones directly correlate murmurs and pathology. • Integrating TTE, CMR, and invasive flow data determines lesion significance.