has part has part characteristic of inheres in has modifier heart contraction Arrhythmia 2012-04-09T12:47:32Z Abnormal heart rate UMLS:C1832603 SNOMEDCT_US:102594003 UMLS:C1842820 HP:0001721 HP:0001666 SNOMEDCT_US:44808001 HP:0001665 HP:0001687 Heart rhythm disorders HP:0001661 UMLS:C0264886 HP:0004351 UMLS:C0003811 Cardiac arrhythmia Cardiac arrhythmias Any cardiac rhythm other than the normal sinus rhythm. Such a rhythm may be either of sinus or ectopic origin and either regular or irregular. An arrhythmia may be due to a disturbance in impulse formation or conduction or both. Irregular heart beat Cardiac rhythm disturbances UMLS:C0522055 HP:0001656 SNOMEDCT_US:698247007 HP:0001675 Irregular heartbeat UMLS:C0855329 HP:0005158 Arrhythmias HP:0011675 Abnormality of cardiovascular system electrophysiology abnormal irregular rhythm