Inherited and acquired vulnerability to ventricular arrhythmias: cardiac [Na.sup.+] and [K.sup.+] channels

I. Introduction II. Long QT Syndrome III. [Na.sub.+] Channelopathies: [I.sub.Na], the Fast Voltage-Gated [Na.sub.+] Channel A. Mutations can result in multiple phenotypes B. The heterogeneous myocardial substrate C. Mutations and/or [...]