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Improved hemodynamic function and mechanical efficiency in congestive heart failure with sodium dichloroacetate
R M Bersin1, C Wolfe, M Kwasman
1Cardiology Division, University of California Medical Center, San Francisco.
Journal of the American College of Cardiology
|June 1, 1994
Summary
Sodium dichloroacetate enhances heart function by increasing lactate consumption and improving mechanical efficiency in patients with congestive heart failure. This metabolic shift offers a potential complementary treatment alongside dobutamine.
Area of Science:
- Cardiology
- Biochemistry
- Pharmacology
Background:
- Congestive heart failure (CHF) is characterized by compromised heart function and reduced mechanical efficiency.
- Dichloroacetate (DCA) targets cellular metabolism by activating pyruvate dehydrogenase, shifting cardiac energy production towards glucose and lactate utilization.
- This metabolic reprogramming by DCA is hypothesized to enhance the mechanical efficiency of the failing heart.
Purpose of the Study:
- To investigate the effects of sodium dichloroacetate (DCA) on hemodynamic performance and mechanical efficiency in patients with severe congestive heart failure.
- To compare the efficacy of DCA with dobutamine, a standard treatment for heart failure.
Main Methods:
- A study involving ten patients diagnosed with New York Heart Association functional class III to IV congestive heart failure.
- Intravenous administration of DCA (50 mg/kg) over 30 minutes, with comprehensive hemodynamic monitoring and assessment of myocardial glucose and lactate metabolism.
- Comparative assessment using dobutamine (5-12.5 µg/kg/min) in the same patient cohort.
Main Results:
- DCA administration led to increased myocardial lactate consumption (29% to 37.4%) and improved left ventricular mechanical efficiency (15.2% to 20.6%).
- Significant improvements were observed in forward stroke volume, left ventricular stroke work, and left ventricular minute work with DCA.
- Dobutamine improved hemodynamics but did not enhance mechanical efficiency and negatively impacted lactate extraction, unlike DCA.
Conclusions:
- Dichloroacetate effectively stimulates myocardial lactate consumption and enhances left ventricular mechanical efficiency in CHF patients.
- DCA improves key hemodynamic parameters, including stroke volume and cardiac work, while reducing myocardial oxygen consumption.
- The distinct metabolic effects of DCA compared to dobutamine suggest a potential synergistic role in managing congestive heart failure.