1 Reilly JG, Ayis SA, Ferrier IN, Jones SJ, Thomas SHL. QTc-interval abnormalities and psychotropic drug therapy in psychiatric patients. Lancet 2000; 355: 1048–52. 2 Sanguinetti MC, Jiang C, Curran ME, Keating MT. A mechanistic link between an inherited and an acquired cardiac arrhythmia. HERG encodes the Ikr potassium channel. Cell 1995; 81: 299–307. 3 Walker BD, Singleton CB, Bursill JA, et al. Inhibition of the human ether-a-go-go related gene (HERG) potassium channel by cisapride: affinity for open and inactivated states. Br J Pharmacol 1999; 127: 243–51. 4 Suessbrich H, Schonherr R, Heinemann SH, Attali B, Lang F, Busch AE. The inhibitory effect of the antipsychotic drug haloperidol on HERG potassium channels expressed in Xenopus Oocytes. Br J Pharmacol 1997; 120: 968–74. 5 Rampe D, Murawsky MK, Grau J, Lewis EW. The antipsychotic agent sertindole is a high affinity antagonist of the human cardiac potassium channel HERG.