A study of influence of chest electrode position upon the electrocardiogram

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  • KYU Kazumi
    Physiology section, Kyorin College School of Medical Technology
  • NONAKA Kazushi
    Physiology section, Kyorin College School of Medical Technology
  • IZUMI Keiko
    Central clinical laboratry, Kyorin University School of Medicine
  • ISHIKAWA Kyozo
    Department of Internal Medicine, Kyorin University School of Medicine

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Other Title
  • 胸部誘導電極の位置の変動に伴う心電図変化について : 特に左室肥大の判定に及ぼす影響について
  • キョウブ ユウドウ デンキョク ノ イチ ノ ヘンドウ ニ トモナウ シンデン

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An influence of chest electrodes position upon the electrocardiogram (ECG) was investigated in this study. One hundred twenty one ECGs were used. All these tracings showed that Sv_1+Rv_5 (or Sv_1+Rv_6) was higher than 3.5mV. ECGs were recorded in three ways ; standard electrodes position (N-level) : one intercostal space above the N-level (A-level) ; and one intercostal space below the N-level (B-level). ECGs recording both at A-level and at B-level resulted in a decrease in the number of the point score system. But there were 19 subjects, in whom left atrial overload was newly observed at A-level. Conclusion ; (1) a slight shift of the chest electrode may lead to an erroneous diagnosis of left ventricular hypertrophy. (2) ECG recording at the one interocostal space above the standard position (A-level) may be useful for the diagnosis of left atrial overload.

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