Transesophageal echocardiography (TEE) has been used routinely in the diagnosis and follow-up of cardiac cases. Left atrial dissection (LAd), an exceedingly rare complication of cardiac surgery, is most commonly associated with mitral valve surgery. A case of LAd is presented, and the pathology was accurately defined and immediately diagnosed using intraoperative TEE. This case highlights the importance of prompt diagnosis of LAd using intraoperative TEE, and a second cardiac surgery was avoided.
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