SQT
1/10000, accelerate repolarization. QTc < 340 ms.  3 K channels of the heart gain of function. Role of K channel blockers? (Sotalol, dofetilide). ICD
role for aborted death cases.
Genetic heterogeneity: SQT1: KCNH2; SQT2: KCNQ1;SQT3: KCNJ2