…Each wave is given the universal name P or QRST. Since P waves originate from excitation of the atria and QRST waves originate from excitation of the ventricles, clues can be obtained from waveform changes (shape and size), phase shifts, the presence or absence of each wave, and the relationship between each wave. The waveform and wave height vary considerably depending on the relative positions of the generator (heart) and the lead-out electrode via the volume conductor, the distance from the excited site, or the lead-out method. … *Some of the terminology that refers to "QRST waves" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…それぞれの波は万国共通の名称P,QRSTがつけられている。P波は心房の興奮に,QRST波は心室の興奮に由来するため,波形の変化(形や大きさ),位相のずれ,各波の出現の有無および各波相互の関係から,心臓の活動状態を推測する手掛りが得られる。波形も波高も,発電体(心臓)と容積伝導体を介しての導出電極との相対的位置,興奮部位からの距離または導出(誘導)方法によってかなり異なってくる。… ※「QRST 波」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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