title: Atrial flutter. I. Electrophysiologic substrates and modes of initiation and termination.
mesh_terms: D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000150:complications; D001282:Atrial Flutter / Q000150:complications / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial; D004554:Electric Countershock; D004562:Electrocardiography; D004594:Electrophysiology; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012032:Refractory Period, Electrophysiological; D013997:Time Factors