Interval analysis of heart rhythm.
D000293:Adolescent; D000328:Adult; D001145:Arrhythmias, Cardiac; D001281:Atrial Fibrillation; D002648:Child; D003202:Computers, Analog; D004562:Electrocardiography; D004582:Electronics, Medical; D006327:Heart Block; D006329:Heart Conduction System; D006801:Humans