Founder mutations characterise the mutation panorama in 200 Swedish index cases referred for Long QT syndrome genetic testing

Background Long QT syndrome(LQTS) is an inherited arrhythmic disorder characterised by prolongation of the QT intervalon ECG, presence of syncopeand sudden death. The symptoms in LQTS patients are highly variable, and genotype influences the clinical course. This study aims to report the spectrum of LQTS mutations in a Swedish cohort.