Five genes have been linked to SQTS (KCNH2, KCNQ1,KCNJ2, CACNA1C and CACNB2b), but the yield of genetic screening remains low (20%overall).10 In otherwords, the chances of a gene mutation be identified and confirm the diagnosis is lowand a negative test does not rule out SQTS since there are mutations unidentified.Besides, our patient had no offspring or siblings so it was considered that genetictest would not add relevant information or change therapeutic management. This evidence concerns the gene KCNQ1 and Familial short QT syndrome.