Dear Peter, Although as you say vagal tone likely has to do with the setting the stage for an arrhythmia to occur, I know of no research that pertains to your particular situation. As a matter of fact, your situation is a case, not a series or a syndrome. I wish you luck in finding others with similar situations. As for your resting heart rate being low, this may have as much to do with your being a conditioned athlete as it does with vagal tone. I hope this information is useful.
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