Tachycardia

Tachycardia is an acceleration of the heart rate above the physiological limit, most often considered to be a value higher than 90-100 beats / min. The most common physiological reason of tachycardia is exercise or another type of physical activity. A pathological cause may be cardiovascular autonomic neuropathy. The opposite of tachycardia is bradycardia.

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 * Bradycardia