title: Irregular tachycardia and cardiovascular collapse.
mesh_terms: D000368:Aged; D001282:Atrial Flutter / Q000503:physiopathology; D004562:Electrocardiography; D006323:Heart Arrest / Q000209:etiology; D006801:Humans; D008297:Male; D013617:Tachycardia, Supraventricular / Q000150:complications / Q000503:physiopathology*