title: ECG Response: October 29, 2013.
mesh_terms: D000368:Aged; D000818:Animals; D001282:Atrial Flutter / Q000150:complications / Q000175:diagnosis*; D054537:Atrioventricular Block / Q000150:complications / Q000175:diagnosis*; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications