Skeletal Muscle Deoxygenation During Exercise Assessed by Near-Infrared Spectroscopy and its Relation to Expired Gas Analysis Parameters
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概要
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The present study was performed to determine the relation between oxygenated hemoglobin(oxy-Hb)changes in working muscles and ventilatory parameters.Six active normal subjects, 21 sedentary normal subjects and 16 patients with heart failure performed an incremental exercise with expired gas analysis.Deoxygenation of the vastus lateralis muscle was monitored for oxy-Hb changes using near-infrared spectroscopy.Near the anaerobic threshold(AT), oxy-Hb started to decrease, forming the first inflection point(PI).Near the respiratory compensation point(RCP), the second inflection point(P2)was observed.Oxygen uptake at the AT, RCP, P1 and P2 decreased in magnitude first in the active normal subjects, then in sedentary normal subjects and finally in the heart failure patients.High correlation was demonstrated between AT and P1(r=0.8, p<0.0005)and between RCP and P2(r=0.9, p<0.0005).In 12 sedentary normal subjects who underwent repeat exercise, reproducibility was confirmed for both P1 and P2.Constant work rate exercises were performed in 5 sedentary normal subjects, and in all of them the oxy-Hb remained unchanged below the AT work rate, whereas oxy-Hb decreased above the AT work rate, Exercise capacity, with respect to both working muscle deoxygenation and ventilation, could be evaluated in detail by the conocomitant use of near-infrared spectroscopy and expired gas analysis.
- 社団法人日本循環器学会の論文
- 1998-08-20
著者
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Ibukiyama Chiharu
Second Department Of Internal Medicine Tokyo Medical University
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TAKEUCHI Toru
Second Department of Internal Medicine,Tokyo Medical College
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SATO Hiroshi
Second Department of Internal Medicine,Tokyo Medical College
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Sato Hiroshi
The Second Department Of Internal Medicine Tokyo Medical University
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Ibukiyama Chiharu
Second Department Of Internal Medicine Tokyo Medical College
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Takeuchi Toru
The Second Department Of Internal Medicine Tokyo Medical University
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Miura Takeshi
The Second Department Of Internal Medicine Tokyo Medical University
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Nishioka Naoko
The Second Department Of Internal Medicine Tokyo Medical University
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Ibukiyama Chiharu
The 2nd Department Of Internal Medicine Tokyo Medical College
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Ibukiyama Chiharu
2nd Department Of Internal Medicine Tokyo Medical College Tokyo
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Fujieda Yoshiharu
Tokyo Gakugei University
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Miura Takeshi
Second Department of Internal Medicine, Tokyo Medical College
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Nishioka Naoko
Second Department of Internal Medicine, Tokyo Medical College
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Terakado Setsuo
Second Department of Internal Medicine, Tokyo Medical College
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Fujieda Yoshiharu
Second Department of Internal Medicine, Tokyo Medical College
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Terakado Setsuo
The Second Department Of Internal Medicine Tokyo Medical University
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Ibukiyama Chiharu
Tokyo Madical College
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Sato Hiroshi
Second Department Of Internal Medicine And Department Of Biology Shiga University Of Medical Science
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Takeuchi Toru
Department Of Internal Medicine Tokyo Medical College
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Satoh Hisashi
Department Of Internal Medicine Tokyo Medical College
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Ibukiyama Chiharu
The 2nd Dept. Of Intern.med. Tokyo Medical College
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