Abstract
Mediastinum tumor is a common disease in thoracic disease; surgical resection is the mainstay of treatment. Many cases have been reported of hemodynamic and airway collapse induced by general anesthesia in patients with an anterior mediastinal mass, and it is a challenge for the anesthesiologists. Preoperative evaluation should be comprehensive, and a good response could be taken in the event of threatening situation. Ventricular fibrillation occurred in the process of particle implantation in this case. After defibrillation, injecting adrenaline, changing position and so on, cardiopulmonary resuscitation (CPR) was successful.