Surgery for cardiac arrhythmias.
D001145:Arrhythmias, Cardiac / Q000601:surgery*; D006329:Heart Conduction System / Q000601:surgery; D006801:Humans; D013610:Tachycardia / Q000601:surgery; D013613:Tachycardia, Ectopic Junctional / Q000601:surgery; D014927:Wolff-Parkinson-White Syndrome / Q000601:surgery