等容收縮時間(英語:Isovolumic contraction time,縮寫IVCT)是心動周期中的一個時間間隔,發生在心室收縮的早期,此時房室瓣主動脈瓣處於關閉狀態,心室收縮,心室內壓力不斷上升,相當於第一心音(S1)的發生時間[1]

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心動周期威格斯圖,上方的第一個標記為等容收縮時間

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