Time sequence of right and left atrial depolarization as a guide to the origin of the P waves.
D000200:Action Potentials; D000328:Adult; D000368:Aged; D016275:Atrial Function; D006328:Cardiac Catheterization; D005117:Cardiac Complexes, Premature / Q000175:diagnosis / Q000209:etiology*; D002648:Child; D002675:Child, Preschool; D004558:Electric Stimulation; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D006329:Heart Conduction System / Q000502:physiology*; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D010138:Pacemaker, Artificial; D013997:Time Factors