KCNH2 and acute myeloid leukemia: Imipramine a known Eag blocker induces apoptosis in acute myeloid leukaemia cells via the caspase-3 activation [73] while it has been shown that HERG expressing cells are more sensitive to apoptosis induced by hydrogen peroxide, with reversal of effect on blocking with a HERG blocker dofetilide [74].