• Mingxia Zheng, Yu Kang, Tong Wang, and Jiafu Wei.
• Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
• Medicine (Baltimore). 2020 Apr 1; 99 (15): e19778.

RationaleTherapeutic or diagnostic thoracentesis is widely used in different clinical settings. Cardiac injury, a rare complication, could lead to fatal consequences. We describe a case of cardiac tamponade complicating thoracentesis that was recognized and rescued in a timely manner.Patient ConcernsA 42-year-old woman underwent blind thoracentesis due to excessive left pleural effusion after left pneumonectomy surgery. She suddenly lost consciousness and was in a state of shock a few minutes after needle insertion and fluid drainage.DiagnosisBedside transthoracic echocardiography revealed pericardial effusion at a depth of 20 mm, and cardiac tamponade complicating thoracentesis was diagnosed.InterventionsAfter draining 250 mL of non-coagulated blood by pericardiocentesis under transthoracic echocardiography guidance, a tube was placed for continuous drainage over the subsequent 36 hours.OutcomesThe patient's hemodynamic condition was stabilized hours after pericardiocentesis. The patient was discharged in good condition a few days later.LessonsImaging assessment and guidance in the process of thoracentesis was indispensable, especially in a patient with altered intra-thoracic anatomy. Cardiac damage, as a life-threatening complication, should be considered once hemodynamic instability occurs during the procedure.

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