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Cardiac arrhythmia - Definition


Definition


Cardiac arrhythmia is an anomaly in the cardiac rhythm which is normally regulated between 60 and 100 beats per minute. It becomes cardiac arrhythmia when the heart's rhythm becomes irregular, when its frequency is modified, or when the heart contractions are unequal. Arrhythmia can then present itself as an irregular rhythm: this is the case of extrasystoles which correspond to the individual beats arriving too early or fibrillations. The atrial fibrillation can pass unnoticed and be discovered on an electrocardiogram; the ventricular fibrillation is more serious, responsible for a loss of consciousness and a risk of sudden death in the absence of medical attention.
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