Atrial premature depolarisation in evaluating sinus node function.
D004558:Electric Stimulation; D006325:Heart Atria / Q000503:physiopathology; D006327:Heart Block / Q000175:diagnosis*; D006801:Humans; D012848:Sinoatrial Block / Q000175:diagnosis*; D012849:Sinoatrial Node / Q000503:physiopathology*