Tachycardia and bradycardia are two types of irregular heart rates. Tachycardia is when the heart beats faster than 100 beats per minute. Bradycardia is when the heart beats slower than 60 beats per ...
Bradycardia does not often cause symptoms. If symptoms of bradycardia do occur, they may include fatigue, lightheadedness, and exercise intolerance. A slow heart rate in young people or athletes or ...