What characterizes arrhythmia during exercise?im a young elite athlete, heart rate seems to rise much quicker than usual.shortness of breath.

Exercise and heart: There are several types of heart conditions which might cause exercise-induced arrhythmias. We cardiologists take these seriously because of the concern of complications including fainting or even sudden death. An athlete with a change in exercise tolerance, shortness of breath or chest discomfort exercising, palpitations or fainting should be evaluated by a cardiologist.