Oxygen Uptake Kinetics During and After Exercise are Useful Markers of Coronary Artery Disease in Patients With Exercise Electrocardiography Suggesting Myocardial Ischemia
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概要
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Background: The aim of the current study was to determine if the slowed exercise oxygen uptake (VO2) kinetics, which is developed by myocardial ischemia, would be accompanied by delayed recovery VO2 kinetics in patients with coronary artery disease (CAD). Methods and Results: Thirty-seven patients with significant ST depression during treadmill exercise underwent cardiopulmonary exercise testing with cycle ergometer. Measurements performed are the ratios of change in increase in oxygen (O2) uptake relative to increase in work rate (ΔVO2/ΔWR) across anaerobic threshold (AT) and 1 mm ST depression point (ST-dep), the time constants of VO2 during recovery (T1/2 VO2), stress radio-isotope scintigraphy and coronary angiography. Patients were divided into CAD positive (CAD+) and CAD negative (CAD-) groups, based on coronary angiography. In CAD+, ΔVO2/ΔWR decreased above AT and ST-dep, in contrast to CAD- patients. The T1/2 VO2 in CAD+ (103.1 ±13.0 s) was greater than that of CAD- (76.5 ±8.7 s) and showed negative correlations to the ratios of ΔVO2/ΔWR across AT and ST-dep. These parameters improved in the patients who underwent coronary bypass surgery. Conclusions: Exercise and recovery VO2 kinetics were slowed when myocardial ischemia was provoked by exercise. Measurement of exercise and recovery VO2 kinetics improve the accuracy of the exercise electrocardiogram diagnosis of CAD.
- 2009-09-20
著者
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TAJIMA Akihiko
The Cardiovascular Institute, Graduate School of Health Sciences Tokyo Medical and Dental University
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ITOH Haruki
Department of Cardiology, Sakakibara Heart Institute
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OSADA Naohiko
The Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medic
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OMIYA Kazuto
The Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medic
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MAEDA Tomoko
Department of Cardiology, Sakakibara Heart Institute
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OHKOSHI Nobuyuki
The Cardiovascular Institute, Graduate School of Health Sciences Tokyo Medical and Dental University
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KAWARA Tokuhiro
Biofunctional Informatics, Graduate School of Health Sciences Tokyo Medical and Dental University
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AIZAWA Tadanori
The Cardiovascular Institute, Graduate School of Health Sciences Tokyo Medical and Dental University
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WASSERMAN Karlman
Respiratory and Critical Care Physiology and Medicine, Harbor-UCLA Medical Center
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Itoh Haruki
Akita University School Of Medicine
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Itoh Hiroshi
Department Of Cardiovascular Medicine Tokyo Medical And Dental University
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IIMURA Hiroyuki
The Cardiovascular Institute
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Inoue Hiroshi
富山大学附属病院 神経内科
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Inoue H
Second Department Of Internal Medicine Graduate School Of Medicine University Of Toyama
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Aizawa Tadanori
The Cardiovascular Institute
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Aizawa Tadanori
東京慈恵会医科大学 医学部循環器内科学
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Aizawa Tadanori
心臓血管研究所
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Itoh Haruki
Department Of Cardiology Sakakibara Heart Institute
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Itoh Haruki
心臓血管研究所
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Takahashi Akihito
The Cardiovascular Institute
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Osada Naohiko
Division Of Cardiology Department Of Internal Medicine St. Marianna University School Of Medicine
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Osada Naohiko
聖マリアンナ医科大学 循環器内科
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Osada Naohiko
St. Marianna University School Of Medicine Division Of Internal Medicine
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Iinuma Hiroyuki
鹿児島大学 大学院医歯学総合研究科循環器・呼吸器・代謝内科学
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Iinuma Hiroyuki
東京健生病院
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Kawara Tokuhiro
Biofunctional Informatics Graduate School Of Health Sciences Tokyo Medical And Dental University
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Ohba Kageyuki
横浜市立みなと赤十字病院 循環器科
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Aizawa T
The Cardiovascular Institute
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Omiya Kazuto
聖マリアンナ医科大学 循環器内科
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Omiya Kazuto
Japanese Cardiac Rehabilitation Research Group (ministry Of Health Labor And Welfare 15a-2)
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Itoh Haruki
Cardiovascular Institute
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Wasserman Karlman
Respiratory And Critical Care Physiology And Medicine Harbor-ucla Medical Center
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Inoue H
Dept. Biotechnology Faculty Of Engineering Sciences
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Inoue Hiroki
Department Of Chemistry Faculty Of Science Kyushu University
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Tajima Akihiko
The Cardiovascular Institute
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Aizawa Tadanori
The Cardiovascular Institute Nippon Medical School
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Kawara Tokuhiro
Biofunctional Informatics Graduate School Of Allied Health Sciences Tokyo Medical And Dental Univers
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Maeda Tomoko
Department Of Cardiology Sakakibara Heart Institute
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Itoh Haruki
Int. Medicine Yokosuka Mutual Aid Hospital.
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Iinuma Hiroyuki
Second Department Of Internal Medicine University Of Toyama
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Aizawa Toru
Department Of Cardiovascular Medicine University Of Tokyo Graduate School Of Medicine
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Maeda Tomoko
Department Of Anatomy And Anthropology Tohoku University School Of Medicine
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Itoh Haruki
Heart Center The Second Department Of Internal Medicine St. Marianna University School Of Medicine H
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Itoh Haruki
Department Of Internal Medicine Chiba Shakai-hoken Hospital
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Oikawa Keiko
Division Of Cardiology Department Of Internal Medicine St. Marianna University School Of Medicine
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Itoh Haruki
The 2nd Department Of Internal Medicine Tokyo Medical And Dental University
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Oomiya Kazuto
Division Of Cardiology St. Marianna University School Of Medicine
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Inagaki Hiroshi
Department Of Cardiovascular Medicine Tokyo Medical And Dental University
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Aizawa Tadanori
Toho University School Of Medicine Cardiovascular Institute
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Ito Hiroshi
Second Department Of Internal Medicine Tokyo Medical And Dental University
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Ito Hiroshi
Akita University School Of Medicine
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Ohkoshi Nobuyuki
The Cardiovascular Institute Graduate School Of Health Sciences Tokyo Medical And Dental University
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Oomiya Kazuto
The 2nd Departmen Of Internal Medicine St. Marianna University School Of Medicine
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Ito Hiroshi
Department Of Cardiovascular Medicine Akita University Graduate School Of Medicine
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Itoh Haruki
Department Of 2nd Internal Medicine St.marianna University School Of Medicine
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Aizawa Tadanori
Cardiovascular Institute School Of Health And Sports Science Juntendo University
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Aizawa Tadanori
Department Of Internal Medicine Cardiovascular Institute Hospital
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Osada Naohiko
Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine
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AIZAWA Tadanori
The Cardiovascular Instirute
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