Influence of Cyclic Variation of Right Ventricular Volume on Left Ventricular Mechanical Parameters Measured With Conductance Catheter
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概要
- 論文の詳細を見る
The conductance catheter is widely used for the continuous measurement of the left ventricular (LV) pressure-volume loops. Cyclical change of the right ventricular (RV) volume may alter the parallel conductance volume, thereby affecting the LV mechanical parameters. Using 8 open-chest adult mongrel dogs, multiple LV pressure-volume loops were obtained by 2 methods: first with a vena cava occlusion (VCO) method, which involved RV volume alteration, and second with a right-heart-bypass (RHB) preparation, which decompressed the right ventricle completely. The slope of the end-systolic pressure-volume relation (E_<es>es), the end-systolic volume associated with the end-systolic pressure of 100 mmHg (V_<100,es>), stiffness constant (β), and the end-diastolic volume associated with the end-diastolic pressure of 9 mmHg (V_<9,ed>) were calculated from each loop. There was minimal influence from RV volume alteration on systolic-phase indices [E_<es> (VCO method, 6.37±1.91 mmHg/ml; RHB preparation, 6.60±1.66mmHg/ml; p=0.356), and V_<100,es> (VCO method, 18.4±9.3 ml; RHB preparation, 17.8±9.0 ml; p=0.681)], but there was a significant influence on diastolic-phase indices [β(VCO method, 0.0599±0.0152; RHB preparation, 0.0839±0.0150; p=0.007), and V_<9,ed> (VCO method, 35.6±11.3ml; RHB preparation, 31.9±12.3 ml; p=0.001)]. The increase in the RV volume in the diastolic phase increased the parallel conductance volume, causing overestimation of the LV diastolic volume measured by the conductance catheter.
- 社団法人日本循環器学会の論文
- 2001-07-20
著者
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Tominaga Ryuji
Department of Cardiovascular Surgery, Graduate School of Medical Sciences, Kyushu University
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Tominaga Ryuji
Department Of Cardiovascular Surgery Faculty Of Medicine Kyushu University
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Tominaga Ryuji
九州大学 医学部循環器外科学分野
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Yasui Hisataka
Department of Cardiovascular Surgery, Toranomon Hospital
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Kawachi Yoshito
The Department Of Cardiovascular Surgery Faculty Of Medicine Kyushu University
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Yasui Hisataka
Department Of Cardiovascular Surgery Graduate School Of Medical Sciences Kyushu University
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Yasui Hisataka
The Division Of Cardiaovascular Surgery Research Institute Of Angiocardiology Faculty Of Medicine Ky
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Yasui Hisataka
Department Of Cadiovasucular Surgery Kyushu University Faculty Of Medicine
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MORITA SHIGEKI
Department of Cardiovascular Surgery, Faculty of Medicine, Kyushu University
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TANOUE Yoshihisa
Department of Cardiovascular Surgery, Kyushu Kosei-Nenkin Hospital
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KAWACHI Yoshito
Department of Cardiovascular Surgery and Clinical Research Laboratory, National Kyushu Medical Cente
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Tomita Yukihiro
Department Of Cardiovascular Surgery Faculty Of Medicine Kyushu University
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Tomita Yukihiro
Division Of Cardiovascular Surgery Graduate School Of Medical Sciences Kyushu University
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Hisahara Manabu
Department of Cardiovascular Surgery, Faculty of Medicine, Kyushu University
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Hisahara Manabu
Department Of Cardiovascular Surgery Faculty Of Medicine Kyushu University
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Tanoue Yoshihisa
Department Of Cardiovascular Surgery Faculty Of Medicine Kyushu University
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Tominaga Ryuji
Department Of Cardiovascular Surgery Kyushu University Hospital
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Morita Shigeki
Department Of Cardiovascular Surgery Kyushu University Hospital
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Morita Shigeki
Department Of Cardiovascular Surgery And Cardiovascular Clinic
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Tominaga Ryuji
Department Of Cadiovasucular Surgery Kyushu University Faculty Of Medicine
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Tominaga Ryuji
Department Of Cardiovascular Surgery Kyushu University School Of Medicine
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Tominaga Ryuji
Department Of Cardiovascular Surgery Kyushu University
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Tomita Yukihiro
Department Of Cardiovascular Surgery Kyushu University
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Tomita Yukihiro
Department Of Cardiovascular Surgery Kyushu University Graduate School Of Medical Sciences
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Kohda Yoshio
Division Of Cardiovascular Surgery Research Institute Of Angiocardiology Faculty Of Medicine Kyushu
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Morita Shigeki
Department Of Cardiovascular Surgery Kyushu University Graduate School Of Medical Sciences
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