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Inherited disorders of voltage-gated sodium channels
Alfred L. George Jr.
Alfred L. George Jr.
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Review Series

Inherited disorders of voltage-gated sodium channels

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Abstract

A variety of inherited human disorders affecting skeletal muscle contraction, heart rhythm, and nervous system function have been traced to mutations in genes encoding voltage-gated sodium channels. Clinical severity among these conditions ranges from mild or even latent disease to life-threatening or incapacitating conditions. The sodium channelopathies were among the first recognized ion channel diseases and continue to attract widespread clinical and scientific interest. An expanding knowledge base has substantially advanced our understanding of structure-function and genotype-phenotype relationships for voltage-gated sodium channels and provided new insights into the pathophysiological basis for common diseases such as cardiac arrhythmias and epilepsy.

Authors

Alfred L. George Jr.

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Figure 6

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Electrophysiological basis for Brugada syndrome. (A) Comparison of endoc...
Electrophysiological basis for Brugada syndrome. (A) Comparison of endocardial and epicardial action potentials in normal heart. The epicardial action potential is shorter because of large transient outward current. (B) Endocardial and epicardial action potentials in Brugada syndrome. Reduced sodium current causes disproportionate shortening of epicardial action potentials with resulting exaggeration of the transmural voltage gradient (horizontal double arrow).

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ISSN: 0021-9738 (print), 1558-8238 (online)

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