AV conduction in sick sinus syndrome.
D001283:Atrioventricular Node / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial; D006327:Heart Block / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D012804:Sick Sinus Syndrome / Q000503:physiopathology* / Q000628:therapy