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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- ŠVÍGLEROVÁ, Jitka. Tachykardie [online]. The last revision 2009-02-18, [cit. 2010-11-09]. <https://web.archive.org/web/20160306065550/http://wiki.lfp-studium.cz/index.php/Tachykardie>.