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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Short QT syndrome ： ウィキペディア英語版 Short QT syndrome Short QT syndrome is a genetic disease of the electrical system of the heart. It consists of a constellation of signs and symptoms, consisting of a short QT interval on an EKG (≤ 300 ms) that does not significantly change with heart rate, tall and peaked T waves, and a structurally normal heart. Short QT syndrome appears to be inherited in an autosomal dominant pattern, and a few affected families have been identified. ==Signs and symptoms== Some individuals with short QT syndrome frequently complain of palpitations and may have unexplained syncope (loss of consciousness). Mutations in the ''KCNH2'', ''KCNJ2'', and ''KCNQ1'' genes cause short QT syndrome. These genes provide instructions for making proteins that act as channels across the cell membrane. These channels transport positively charged atoms (ions) of potassium into and out of cells. In cardiac muscle, these ion channels play critical roles in maintaining the heart's normal rhythm. Mutations in the ''KCNH2'', ''KCNJ2'', or ''KCNQ1'' gene increase the activity of the channels, which changes the flow of potassium ions between cells. This disruption in ion transport alters the way the heart beats, leading to the abnormal heart rhythm characteristic of short QT syndrome. Short QT syndrome appears to have an autosomal dominant pattern of inheritance. Short QT syndrome is associated with an increased risk of sudden cardiac death, most likely due to ventricular fibrillation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Short QT syndrome」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.