Fig. 1
From: Jervell and Lange-Nielsen syndrome with novel KCNQ1 and additional gene mutations

Roman numerals refer to the different generations, and numbers 1–8 identify individuals within each generation. The proband is indicated by the arrow (IV-1). The phenotypes are indicated by half-filled circles or squares; long QT is shown on the left, and deafness is shown on the right. QTc time, electrocardiograms, and the genotypes of the proband and his parents (III-2, III-6) are indicated.