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  • Title: Effect of partial inhibition of fatty acid oxidation by trimetazidine on whole body energy metabolism in patients with chronic heart failure.
    Author: Fragasso G, Salerno A, Lattuada G, Cuko A, Calori G, Scollo A, Ragogna F, Arioli F, Bassanelli G, Spoladore R, Luzi L, Margonato A, Perseghin G.
    Journal: Heart; 2011 Sep; 97(18):1495-500. PubMed ID: 21700755.
    Abstract:
    OBJECTIVE: Trimetazidine may have beneficial effects on left ventricular (LV) function in patients with systolic heart failure. The authors assessed whether long-term addition of trimetazidine to conventional treatment could improve, along with LV function, resting whole body energy metabolism in patients with chronic systolic heart failure. DESIGN: Single blind randomised study. SETTING: University Hospital. PATIENTS: 44 patients with systolic heart failure receiving full medical treatment. INTERVENTIONS: Indirect calorimetry and two-dimensional echocardiography at baseline and after 3 months. MAIN OUTCOME MEASURES: Whole body resting energy expenditure (REE), percentage of predicted REE, LV ejection fraction (EF), NYHA class, quality of life. RESULTS: Trimetazidine increased EF compared with conventional therapy alone (from 35±8% to 42±11% vs from 35±7% to 36±6%; p=0.02, analysis of variance for repeated measures). NYHA class and quality of life also improved compared with conventional therapy (p<0.0001). REE (from 1677±264 to 1580±263 kcal/day) and percentage of predicted REE (based on the Harris-Benedict equation: from 114±10% to 108±9%) decreased in the trimetazidine group, but not in the control group (REE from 1679±304 to 1690±337 kcal/day and percentage of predicted REE from 113±12% to 115±14%). The variation was different between groups (p=0.03 and 0.023, respectively). CONCLUSIONS: In patients with systolic heart failure, improvement in functional class and LV function induced by middle-term trimetazidine therapy is paralleled by a reduction in whole body REE. The beneficial cardiac effects of trimetazidine may be also mediated by a peripheral metabolic effect.
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