title: ECG Response: January 13, 2015.
mesh_terms: D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D018879:Ventricular Premature Complexes / Q000175:diagnosis / Q000503:physiopathology*