Free fatty acid kinetics and oxidation in congestive heart failure

被引:99
|
作者
Lommi, J
Kupari, M
Yki-Järvinen, H
机构
[1] Univ Helsinki, Div Cardiol, Helsinki, Finland
[2] Univ Helsinki, Dept Med, Div Endocrinol, Helsinki, Finland
[3] Univ Helsinki, Dept Med, Div Diabetol, Helsinki, Finland
来源
AMERICAN JOURNAL OF CARDIOLOGY | 1998年 / 81卷 / 01期
基金
芬兰科学院;
关键词
D O I
10.1016/S0002-9149(97)00804-7
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To characterize fuel utilization of patients with congestive heart failure (CHF), we measured serum free fatty acid (FFA), counterregulatory hormone concentrations, whole body substrate oxidation rates (indirect calorimetry), and the turnover and oxidation rates of FFA ([1-C-14]-palmitate infusion) in 7 patients with CHF and in 7 cardiac patients without CHF after an overnight fast. Plasma glucose and serum insulin concentrations were comparable, whereas serum FFA, blood ketone body, and fasting blood lactate (p <0.05 for all) concentrations were significantly increased in patients with CHF compared to those without CHF. Pasting plasma norepinephrine (p <0.05), serum cortisol (p <0.01), and growth hormone (p <0.01) concentrations were also higher in patients with CHF than in those without CHF. Rates of energy expenditure at rest (62 +/- 2 vs 56 +/- 1 J . kg(-1) . min(-1), p <0.05), FFA turnover (6.5 +/- 0.5 vs 5.0 +/- 0.4 mu mol . kg(-1) . min(-1), p <0.05), and oxidation (2.0 +/- 0.2 vs 1.5 +/- 0.1 mu mol . kg(-1) . min(-1) p <0.05) were significantly higher in patients with CHF than in control subjects. In univariate analysis, the left ventricular ejection fraction was inversely correlated and the plasma norepinephrine concentration positively correlated with both energy expenditure at rest, FPA turnover, and the FFA oxidation rate. In multivariate analysis, the plasma norepinephrine concentration was the most significant predictor of increased FPA oxidation rate. We conclude that release of FFAs to the circulation and their subsequent oxidation are increased in patients with severe CHP after an overnight fast. These changes might reflect stress hormone-induced lipolysis and accompanying stimulation of serum FPA oxidation via mass action. (C) 1998 by Excerpta Medica, Inc.
引用
收藏
页码:45 / 50
页数:6
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