Cardiac ultrarapid delayed rectifiers: a novel potassium current family o f functional similarity and molecular diversity.

Abstract excerpt

Classical cardiac delayed rectifier currents activate at least two orders of magnitude slower than delayed rectifier currents in nerve and skeletal muscle tissue. It has recently become evident that many cardiac tissues express delayed rectifier currents with kinetics similar to those of nerve and muscle. These currents have been designated I(Kur) (for 'ultrarapid' delayed rectifier), in contrast to the classical...

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