We found 41 unreported associations, including four with supraventricular tachycardia (SVT), one of which is with a low-frequency variant located near KCND3, a potassium channel gene that has been implicated in Brugada syndrome52 and AF27, and is the first genome-wide significant SVT association. The gene discussed is KCND3; the disease is Supraventricular tachycardia.