If it is an iregular heart rythem then stoping your heart would certainly be a normal and established way to try to corect it. It kind of sounded like the doctor wasn't sure what the cause was and perhaps I took that to mean he didn't completlly know what the problem was. Perhaps you should ask him to explain more about what the problem is and why stopping your heart might fix it. I would still get a second opinion though. Doctors can be wrong sometimes.