I have an ICD, and have had to have two lead revisions, once when the lead failed to implant, and the second when it cracked. My resting pulse is 100bpm, and the device overpaces me if I exceed 140bpm (unless having sex, when it kicks in at 220bpm. Is this so I'll die happy?). So in ten years my leads cop at least 500 million bends. Since my device does cardioversion and defibrillation there's no way a wireless implant in the atrium and ventricle will work.

The doctors keep quoting figures of how reliable this tech is, but I've had 3 procedures due to device failure in the last 5 years.