Interrelation between myocardial oxidative metabolism and diastolic function in patients undergoing surgical ventricular reconstruction

Satoru Chiba, Masanao Naya, Hiroyuki Iwano, Keiichiro Yoshinaga, Chietsugu Katoh, Osamu Manabe, Satoshi Yamada, Satoru Wakasa, Suguru Kubota, Yoshiro Matsui, Nagara Tamaki, Hiroyuki Tsutsui

研究成果: ジャーナルへの寄稿記事

抄録

Purpose: Diastolic function is impaired in patients with end-stage heart failure. Favorable structural changes by surgical ventricular reconstruction (SVR) are thought to improve diastolic function, however, previous studies reported the contradictory results. We hypothesized that cardiac oxidative metabolism and diastolic dysfunction might improve in parallel to the reduction of left ventricular chamber size after SVR. Methods: We studied 11 patients underwent SVR associated with mitral valve repair for end-stage heart failure due to dilated cardiomyopathy. Diastolic function was assessed by echocardiography and myocardial oxidative metabolism was measured by the monoexponential clearance (k-mono) of 11C-acetate positron emission tomography at baseline and 1 month after SVR. Results: All patients had preoperative severe diastolic dysfunction [E/A 4.11 ± 1.18, deceleration time (DT) 134 ± 26 ms]. The study patients were divided into 2 groups according to the changes in diastolic function after SVR; unchanged or worsened diastolic function in 6 patients (55 %, Non-responder) and improved diastolic function in 5 (45 %, Responder). K-mono and wall stress decreased only in responder. The changes in k-mono before and after SVR correlated with those in deceleration time (r = -0.63; p < 0.05) and wall stress (r = 0.75; p < 0.01). Conclusions: Improvement of diastolic dysfunction in patients with end-stage heart failure by SVR was in parallel to that in oxidative metabolism. It suggests that SVR reduced excessive metabolism during the diastolic phase, in part, via the improvement in diastolic function and the reduction in LV wall stress.

元の言語英語
ページ(範囲)349-355
ページ数7
ジャーナルEuropean Journal of Nuclear Medicine and Molecular Imaging
40
発行部数3
DOI
出版物ステータス出版済み - 2 1 2013

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Deceleration
Heart Failure
Dilated Cardiomyopathy
Mitral Valve
Positron-Emission Tomography
Echocardiography
carbon-11 acetate

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

これを引用

Interrelation between myocardial oxidative metabolism and diastolic function in patients undergoing surgical ventricular reconstruction. / Chiba, Satoru; Naya, Masanao; Iwano, Hiroyuki; Yoshinaga, Keiichiro; Katoh, Chietsugu; Manabe, Osamu; Yamada, Satoshi; Wakasa, Satoru; Kubota, Suguru; Matsui, Yoshiro; Tamaki, Nagara; Tsutsui, Hiroyuki.

:: European Journal of Nuclear Medicine and Molecular Imaging, 巻 40, 番号 3, 01.02.2013, p. 349-355.

研究成果: ジャーナルへの寄稿記事

Chiba, Satoru ; Naya, Masanao ; Iwano, Hiroyuki ; Yoshinaga, Keiichiro ; Katoh, Chietsugu ; Manabe, Osamu ; Yamada, Satoshi ; Wakasa, Satoru ; Kubota, Suguru ; Matsui, Yoshiro ; Tamaki, Nagara ; Tsutsui, Hiroyuki. / Interrelation between myocardial oxidative metabolism and diastolic function in patients undergoing surgical ventricular reconstruction. :: European Journal of Nuclear Medicine and Molecular Imaging. 2013 ; 巻 40, 番号 3. pp. 349-355.
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abstract = "Purpose: Diastolic function is impaired in patients with end-stage heart failure. Favorable structural changes by surgical ventricular reconstruction (SVR) are thought to improve diastolic function, however, previous studies reported the contradictory results. We hypothesized that cardiac oxidative metabolism and diastolic dysfunction might improve in parallel to the reduction of left ventricular chamber size after SVR. Methods: We studied 11 patients underwent SVR associated with mitral valve repair for end-stage heart failure due to dilated cardiomyopathy. Diastolic function was assessed by echocardiography and myocardial oxidative metabolism was measured by the monoexponential clearance (k-mono) of 11C-acetate positron emission tomography at baseline and 1 month after SVR. Results: All patients had preoperative severe diastolic dysfunction [E/A 4.11 ± 1.18, deceleration time (DT) 134 ± 26 ms]. The study patients were divided into 2 groups according to the changes in diastolic function after SVR; unchanged or worsened diastolic function in 6 patients (55 {\%}, Non-responder) and improved diastolic function in 5 (45 {\%}, Responder). K-mono and wall stress decreased only in responder. The changes in k-mono before and after SVR correlated with those in deceleration time (r = -0.63; p < 0.05) and wall stress (r = 0.75; p < 0.01). Conclusions: Improvement of diastolic dysfunction in patients with end-stage heart failure by SVR was in parallel to that in oxidative metabolism. It suggests that SVR reduced excessive metabolism during the diastolic phase, in part, via the improvement in diastolic function and the reduction in LV wall stress.",
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T1 - Interrelation between myocardial oxidative metabolism and diastolic function in patients undergoing surgical ventricular reconstruction

AU - Chiba, Satoru

AU - Naya, Masanao

AU - Iwano, Hiroyuki

AU - Yoshinaga, Keiichiro

AU - Katoh, Chietsugu

AU - Manabe, Osamu

AU - Yamada, Satoshi

AU - Wakasa, Satoru

AU - Kubota, Suguru

AU - Matsui, Yoshiro

AU - Tamaki, Nagara

AU - Tsutsui, Hiroyuki

PY - 2013/2/1

Y1 - 2013/2/1

N2 - Purpose: Diastolic function is impaired in patients with end-stage heart failure. Favorable structural changes by surgical ventricular reconstruction (SVR) are thought to improve diastolic function, however, previous studies reported the contradictory results. We hypothesized that cardiac oxidative metabolism and diastolic dysfunction might improve in parallel to the reduction of left ventricular chamber size after SVR. Methods: We studied 11 patients underwent SVR associated with mitral valve repair for end-stage heart failure due to dilated cardiomyopathy. Diastolic function was assessed by echocardiography and myocardial oxidative metabolism was measured by the monoexponential clearance (k-mono) of 11C-acetate positron emission tomography at baseline and 1 month after SVR. Results: All patients had preoperative severe diastolic dysfunction [E/A 4.11 ± 1.18, deceleration time (DT) 134 ± 26 ms]. The study patients were divided into 2 groups according to the changes in diastolic function after SVR; unchanged or worsened diastolic function in 6 patients (55 %, Non-responder) and improved diastolic function in 5 (45 %, Responder). K-mono and wall stress decreased only in responder. The changes in k-mono before and after SVR correlated with those in deceleration time (r = -0.63; p < 0.05) and wall stress (r = 0.75; p < 0.01). Conclusions: Improvement of diastolic dysfunction in patients with end-stage heart failure by SVR was in parallel to that in oxidative metabolism. It suggests that SVR reduced excessive metabolism during the diastolic phase, in part, via the improvement in diastolic function and the reduction in LV wall stress.

AB - Purpose: Diastolic function is impaired in patients with end-stage heart failure. Favorable structural changes by surgical ventricular reconstruction (SVR) are thought to improve diastolic function, however, previous studies reported the contradictory results. We hypothesized that cardiac oxidative metabolism and diastolic dysfunction might improve in parallel to the reduction of left ventricular chamber size after SVR. Methods: We studied 11 patients underwent SVR associated with mitral valve repair for end-stage heart failure due to dilated cardiomyopathy. Diastolic function was assessed by echocardiography and myocardial oxidative metabolism was measured by the monoexponential clearance (k-mono) of 11C-acetate positron emission tomography at baseline and 1 month after SVR. Results: All patients had preoperative severe diastolic dysfunction [E/A 4.11 ± 1.18, deceleration time (DT) 134 ± 26 ms]. The study patients were divided into 2 groups according to the changes in diastolic function after SVR; unchanged or worsened diastolic function in 6 patients (55 %, Non-responder) and improved diastolic function in 5 (45 %, Responder). K-mono and wall stress decreased only in responder. The changes in k-mono before and after SVR correlated with those in deceleration time (r = -0.63; p < 0.05) and wall stress (r = 0.75; p < 0.01). Conclusions: Improvement of diastolic dysfunction in patients with end-stage heart failure by SVR was in parallel to that in oxidative metabolism. It suggests that SVR reduced excessive metabolism during the diastolic phase, in part, via the improvement in diastolic function and the reduction in LV wall stress.

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