title: Spontaneous directional change of F waves in atrial flutter.
abstract: Spontaneous change in direction of F waves in atrial flutter is rare. Its analysis may lend some insight to the current uncertainty about mechanisms responsible for atrial flutter.
mesh_terms: D000368:Aged; D001282:Atrial Flutter / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D007979:Levocardia / Q000150:complications; D009203:Myocardial Infarction / Q000150:complications