Definition of extrasystole
: a premature beat of one of the chambers of the heart that leads to momentary arrhythmia
Origin and Etymology of extrasystole
First Known Use: circa 1900See Words from the same year
Medical Definition of extrasystole
: a prematurely occurring beat of one of the chambers of the heart that leads to momentary arrhythmia but leaves the fundamental rhythm unchanged—called also premature beat
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