title: ECG Response: March 11, 2014.
mesh_terms: D054537:Atrioventricular Block / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013616:Tachycardia, Sinus / Q000175:diagnosis* / Q000503:physiopathology; D013997:Time Factors