title: Double atrial parasystole. Case report.
abstract: A 62 year-old man with hiatal hernia and complex atrial arrhythmia is reported. On the standard electrocardiogram a double atrial parasystole is found, with reversed coupling. During carotid sinus massage only one of the parasystolic foci is not influenced, and assumes the atrial activity, regularizing the cardiac rhythm.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000209:etiology; D006325:Heart Atria; D006551:Hernia, Hiatal / Q000150:complications; D006801:Humans; D008297:Male; D008875:Middle Aged