We report a case of extracorporeal shock wave lithotripsy (SWL) for ureteral stone in patient with implanted cardiac pacemaker. A 68-year-old woman was admitted to our hospital for left back pain due to left single ureteral stone (13 x 7 mm) in 2002. A permanent cardiac pacemaker has been implanted for sick sinus syndrome in 1997. After evaluation for cardiac function and pacemaker function by a cardiologist and a pacemaker technician, SWL (MFL 5000, Dornier) was performed without changing pacemaker mode (DDD mode). Shock waves were incorrectly exposed a few time triggered by arterial pacing amplitude, but no cardiovascular event or malfunction of the pacemaker was occurred during or after SWL. The ureteral stone was successfully fragmented with 2,400 shock waves (24 kV) and the fragments were delivered immediately.
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