Look up: extrasystole

1. Extrasystole
   Extrasystole: A premature contraction of the heart that is independent of the normal rhythm of the heart and that arises in response to an impulse in some part of the heart other than the normal impulse from the sinoatrial (SA) node. The extrasystole is followed by a pause, as the heart electrical s...
   Found on http://www.medterms.com/script/main/art.
   
   
2. extrasystole
   A premature contraction of the heart that is independent of the normal rhythm and arises in response to an impulse in some part of the heart other than the sinoatrial node. ... Synonym: premature beat. ... (18 Nov 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
3. extrasystole
   noun a premature systole resulting in a momentary cardiac arrhythmia
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
4. extrasystole
   (eks″trә-sis´to-le) a premature cardiac contraction that is independent of the normal rhythm and arises in response to an impulse outside the sinoatrial node.
   Found on http://www.encyclo.co.uk/local/21001
   
   
5. extrasystole
   a premature contraction of the heart that is independent of the normal rhythm and arises in response to an impulse in some part of the heart other than the sinoatrial node; called also premature beat.
   Found on http://users.ugent.be/~rvdstich/eugloss/
   
   
6. extrasystole
   Type: Term Pronunciation: eks′tră-sis′tō-lē Definitions: 1. A nonspecific word for an ectopic beat from any source in the heart. Synonyms: premature beat, premature systole
   Found on http://www.medilexicon.com/medicaldictio