Signal-averaged Electrocardiogram Shows a Heart Rate Dependent Diurnal Variation in Healthy Subjects.
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概要
- 論文の詳細を見る
It has not been determined if signal-averaged electrocardiograms (SAECGs) have a diurnal variation. We recorded 3-channel 24-hour ECGs in 30 healthy volunteers and calculated the following parameters for the first 500sec of every hour over the 24-hour period: the mean heart rate, the filtered QRS duration (f-QRS), the root-mean-square voltage of the signals in the last 40msec of the QRS (RMS40), and the duration of low-amplitude signals (<40μV) in the terminal portion of the QRS (LAS40). Heart rate and RMS40 increased in the daytime compared with the nighttime; f-QRS and LAS40 increased during the nighttime hours. The f-QRS and LAS40 were negatively correlated with heart rate in all and 22 (73%) of 30 subjects, respectively, and RMS40 was positively correlated with heart rate in 21 subjects (70%). In conclusion, SAECGs exhibit a clear diurnal variation in healthy subjects, which is closely related to changes in heart rate.
- International Heart Journal刊行会の論文
著者
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ITO MORIO
Department of Laboratory Medicine, Oita Medical University
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Ishida Shuji
Department Of Botany Faculty Of Science Kyoto University
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Iwao Tetsu
Department Of Cardiology Oita National Hospital
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FUJINO Takao
Department of Laboratory Medicine
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Yonemochi Hidetoshi
Department Of Bioclimatology And Medicine Medical Institute Of Bioregulation Kyushu University
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Ito Morio
Department Of Laboratory Medicine Medical Callege Of Oita
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YONEMOCHI Hidetoshi
Department of Laboratory Medicine, Oita Medical University
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Saikawa Tetsunori
Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
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Nakagawa Mikiko
Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
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Nakagawa Mikiko
Department of Laboratory Medicine, Oita Medical University
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IWAO Tetsu
Department of Laboratory Medicine, Oita Medical University
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ODA Mari
Department of Laboratory Medicine, Oita Medical University
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Ito Morio
Department of Health Care Center, Munakata Ishikai-Hospital
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SAIKAWA Tetsunori
Department of Internal Medicine, Oita Medical University
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