Mechanisms of genetic arrhythmias: from DNA to ECG.

Abstract excerpt

A precise balance of ionic currents underlies normal cardiac excitation and relaxation. Disruption of this equilibrium by genetic defects, polymorphisms, therapeutic intervention, and structural abnormalities can cause arrhythmogenic phenotypes leading to syncope, seizures, and sudden cardiac death. Congenital defects result in an unpredictable expression of phenotypes with variable penetrance, even within single...

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