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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 Interbeat interval ： ウィキペディア英語版 Interbeat interval Interbeat interval is a scientific term used in the study of the mammalian heart. == Definition == Interbeat interval is a scientific term used in reference to the time interval between individual beats of the mammalian heart. Interbeat interval is abbreviated "IBI" and is sometimes written with a hyphen, "inter-beat interval." It is also sometimes referred to as "beat-to-beat" interval. IBI is generally measured in units of milliseconds. In normal heart function, each IBI value varies from beat to beat. This natural variation is known as ''heart rate variability'' (HRV). However, certain cardiac conditions may cause the individual IBI values to become nearly constant, resulting in the HRV being nearly zero. This can happen, for example, during periods of exercise as the heart rate increases and the beats become regular. Certain illnesses can cause the heart rate to increase and become uniform as well, such as when a subject is afflicted by an infection. 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「Interbeat interval」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.