Abstract
We present a unique case of left atrial (LA) dissection in a 46-year-old man following aortic dissection surgery. The LA dissection was attributed to coronary sinus catheter-related injury. This report highlights the importance of recognizing this rare complication and the crucial role of transesophageal echocardiography in its diagnosis. We discuss the pathogenesis, diagnostic criteria, and management strategies for LA dissection.