Diagnosis of Persistent Left Superior Vena Cava by Transesophageal Echocardiography During Minimally Invasive Cardiac Surgery.

• PLSVC is the commonest thoracic venous anomaly. • The presence of PLSVC has implications for MICS. • TEE has a high sensitivity for diagnosing PLSVC. • Timely PLSVC identification is critical for procedural planning and success. • Identification of a right-sided IED generator position should raise suspicion for PLSVC.