QT時間

正常な心電図のイメージ図
青色で示すのがQT時間

QT時間（キュー・ティーじかん、QT interval）とは、ヒトの心電図におけるQ波の始まりからT波の終わりにいたるまでの時間のこと。

意義

心電図の例

心電図ではQT時間にはQ波、R波、S波、T波が含まれる。これは心室での収縮期の、心筋細胞のイオンの出入りを意味する電気信号の伝導を反映する[1]。現実に遭遇する生命にかかわる病態としては、QT延長症候群が多い。

QTc

QTc（補正QT時間）とは、QT時間を心拍数で補正した値である[2]。Bazettによる補正式は下式で表される[2]。

QTc = QT/ √RR

RR: R波と次のR波の間隔

QT短縮

など。

QT延長

脚注

[脚注の使い方]
  1. ^ QTの基礎 - 富山大学附属病院ホームページ
  2. ^ a b 臨床支援アプリHOKUTO. “QTc (補正QT時間) | 計算 | 心電図からQTc時間を算出 | HOKUTO”. 臨床支援アプリHOKUTO. 2024年11月2日閲覧。

外部リンク

スタブアイコン

この項目は、医学に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めています（プロジェクト:医学／Portal:医学と医療）。

循環器系の正常構造・生理
心臓
肉眼解剖
基本構造
左心
右心
冠動脈系
刺激伝導系
顕微解剖
生理学
電気
物理
生化学
血管
肉眼解剖
動脈系
大動脈
総頸
外頸
上甲状腺
上行咽頭
舌
顔面
後頭
後耳介
浅側頭
顎
内頸
頸部
錐体部
海綿静脈洞部/
眼
大脳動脈輪
鎖骨下
椎骨
甲状頸
下甲状腺
頸横
肩甲上
肋頸
カテゴリ カテゴリ
上肢
胸部
腹部
下肢
静脈系
大静脈
上大静脈系
下大静脈系
頭頸部の静脈・静脈洞
外頸
内頸
板間/脳
その他
椎骨静脈
腕頭
カテゴリ カテゴリ
上肢
胸部
腹部
下肢
肺循環系
肝循環系
腎循環
顕微解剖
生理学
生化学
 
疾患
心疾患
不整脈
徐脈性
頻脈性
上室性
心室性
虚血性疾患
弁膜症
先天性心疾患    
心内膜・心筋・心膜疾患
心内膜疾患
心膜疾患
心筋疾患
血管疾患
大血管
動脈
静脈
 
治療
外科的治療
冠動脈バイパス術 (CABG)
弁膜症手術
小児心臓外科
心不全外科
不整脈外科
大動脈手術
末梢血管手術
内科的治療
循環作動薬
抗不整脈薬
心不全治療薬
狭心症治療薬
降圧薬
血管内治療

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