More on exercise PVCs

1- Are PVCs that happen after activities or exercise in a normal heart function still harmless and not a cause of worry or carry a risk?2- During any arrhythmia onset (like A-fib or V-tach) what causes the syptoms assoiated like feeling dizzy, lightheaded or short breath. Is it the arrhythmia it self or teh fast heart rate that cause the heart to pump blood ineffecinat manner? 

1: Read this:
2: Both

Hope this helps,
Dr T


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