Source:http://linkedlifedata.com/resource/umls/id/C2346542
NCI: A electrocardiographic finding of an electrical phenomenon in which the ratio of electrical impulse generated above the atrioventricular node to the number of impulses conducted through to the ventricles is 2:1. (NCI),NCI: A electrocardiographic finding of an electrical phenomenon in which the ratio of electrical impulse generated above the atrioventricular node to the number of impulses conducted through to the ventricles is 2:1.