DAY-TO-DAY VARIATION OF THE FREQUENCY OF VENTRICULAR PREMATURE CONTRACTIONS DEPENDS ON VARIATION OF HEART RATES
スポンサーリンク
概要
- 論文の詳細を見る
To examine the manner in which spontaneous variation in the frequency of ventricular premature contractions (VPCs) relates to the variation of heart rate (HR), 68 patients with frequent VPCs were studied, by using 24-hour ECG recordings. All patients had more than 40 VPCs/hour on an initial 24-hour ECG recording and a second recording was made within 2 months (mean: 15 days). For each patient, the HR-dependecy of VPCs was evaluated. Plots of VPC frequency per minute (VPCs/min) vs. HR were made at 1-beat/min steps for all HRs recorded for at least 5 min during 24 hours. Based on the patterns of correlation between VPCs/min and HR observed at the first recording, patients were divided into 2 groups: 1) 26 with a positive correlation or the P group (a linear increase in VPCs/min with increasing HRs) and 2) 42 with a non-positive correlation or the NP group. The NP group included: 1) an increased VPCs/min at low HRs and a decrease at high HRs (38 patients), 2) a linear decrease in VPCs/min with increased HRs (2 patients) and 3) constant VPCs/min at all HRs (2 patients). The patterns of correlation were reproducible at the second recording period in 65 of 68 patients (96%). Variability in the VPC frequency per 24 hours between two 24-hour recording periods was significantly greater in the P than in the NP group, while the variability in the mean daily HR was similar between the 2 groups. Thus, the 95% confidence limit for spontaneous reduction in the VPC frequency was greater for the P (67%) than for the NP group (50%). The percent change in VPC frequency per 24 hours at the seond recording period relative to the first (y) showed a significant positive relationship with the percent change of mean daily HR (x) both P (y=5.9x 17.6, r=0.80, p 0.001) and NP (y=1.8x4.6, r=0.34, p 0.05) groups. However, the correlation coefficient and the slope of regression were significantly greater in the P than in the NP group. These observations indicate that the spontaneous variation of HR is a pivotal determinant of VPC variation, particularly in cases of the P group.
- 社団法人日本循環器学会の論文
- 1988-11-20
著者
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ITO MORIO
Department of Laboratory Medicine, Oita Medical University
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ARITA MAKOTO
Department of Physiology, Oita Medical University
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Saikawa Tetsunori
First department of Internal Medicine, Oita Medical University
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Arita M
Department Of Cardiovascular Science Oita Medical University
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Arita M
The Department Of Physiology Medical College Of Oita
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Ito Snkenobu
1st Dept. Of Intern. Med. Facult. Of Med. Kyushu Univ.
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Saikawa Tetsunori
First Department Of Internal Medicine Medical College Of Oita
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Ito Morio
Department Of Laboratory Medicine School Of Medicine Oita Medical University
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Ito Seiki
1st Department Of Medicine Medical College Of Oita
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Ito Morio
Department Of Laboratory Medicine Oita Medical University
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Arita M
Department Of Physiology Oita Medical University
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Arita Makoto
Department Of Cardiovascular Science Oita Medical University
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Ito Sukenobu
Department Of Internal Medicine Medical College Of Oita
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Ito Sukenobu
1st Department Of Medicine Medical College Of Oita
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Ito Sukenobu
First Department Of Internal Medicine Faculty Of Medicine Kyushu University
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Tsumabuki Shigeru
Department of Laboratory Medicine , Medical College of Oita
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ITO SUKENOU
First Department of Internal Medicine, Medical College of Oita
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ITO MORIO
Kyushu Univ.
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Ito Morio
Tottori Univ.
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Itoh Morio
The First Department Of Internal Medicine Faculty Of Medicine Kyushu University
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Ito Morio
Oita Medical Univ. Oita
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Tsumabuki Shigeru
Department Of Laboratory Medicine Medical College Of Oita
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Arita Makoto
Department Of Cardiology Yufuin Kohseinenkin Hospital
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Ito Morio
Department Of Laboratory Medicine Medical Callege Of Oita
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Ito Morio
Department of Health Care Center, Munakata Ishikai-Hospital
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