It was reported that vessel dissection, hypotension, and cardiac arrest occurred requiring surgery to resolve.The patient presented for a procedure to implant a cardioresynchronizer.Following cannulation of the coronary sinus, a 182cm choice guidewire was introduced.As the guidewire was being advanced, resistance was encountered and a dissection of the coronary sinus was noted.The patient then experienced hypotension and cardiac arrest.The patient was resuscitated and pericardiocentesis was performed.The patient was transferred urgently to the operating room where the bleeding was controlled.An epicardial left ventricular (lv) electrode was implanted and the patient is expected to fully recover.
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