臨床検査51巻7号

2007年07月発行

今月の主題 不整脈検査 不整脈の検査

T波交互脈

著者： 池田隆徳¹

所属機関： ¹杏林大学医学部第二内科

ページ範囲：P.709 - P.714

　T波交互脈(T-wave alternans；TWA)とは，形の異なるT波が1拍ごとに交互にみられる現象である．スペクトル解析によって検出されるマイクロボルトTWAが心臓突然死の予知指標として活用されている．最近では，Holter心電図をタイムドメイン解析することでTWAを検出する解析プログラムも発売されている．TWAの予知指標としての特徴は，不整脈事故に対して陰性的中率が極めて高いことであり，心筋梗塞/虚血性心筋症や拡張型心筋症/心不全において多くのエビデンスが出されている．

参考文献

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