title: ECG Response: September 17, 2013.
mesh_terms: D000368:Aged; D001283:Atrioventricular Node / Q000502:physiology; D004562:Electrocardiography / Q000379:methods*; D006325:Heart Atria / Q000503:physiopathology; D006333:Heart Failure / Q000175:diagnosis* / Q000503:physiopathology*; D006801:Humans; D008133:Long QT Syndrome / Q000175:diagnosis* / Q000503:physiopathology*; D008297:Male; D012849:Sinoatrial Node / Q000502:physiology