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Diabetes mellitus and heart failure
Dinesh Jagasia1, Patrick H McNulty
1Division of Cardiology, University of Iowa, Iowa City, IA, USA.
Insights
Type 2 diabetes significantly raises heart failure risk. Better control of blood sugar and fatty acids may prevent or delay heart failure development in diabetic patients.
Area of Science:
- Cardiology
- Endocrinology
- Metabolic Diseases
Background:
- Type 2 diabetes mellitus (T2DM) is a major risk factor for heart failure (HF).
- Established links include hypertension, dyslipidemia, and coronary atherosclerosis.
- Emerging evidence suggests direct pathophysiological mechanisms beyond traditional risk factors.
Purpose of the Study:
- To explore novel pathophysiologic links between T2DM and HF.
- To identify potential therapeutic targets for HF prevention in diabetic individuals.
Main Methods:
- Review of current literature on T2DM and HF pathophysiology.
- Analysis of proposed mechanisms involving hyperglycemia, excess fuel substrates, and impaired glucose transport.
Main Results:
- Hyperglycemia may impair endothelial function and redox balance.
- Excess glucose and fatty acids can adversely affect cardiomyocyte structure and signaling.
- Diabetes might hinder myocardial glucose uptake during ischemia.
Conclusions:
- Normalization of the diabetic metabolic state may mitigate HF risk.
- Strategies targeting glucose and fatty acid control could prevent or delay HF in T2DM patients.
Abstract:
Type 2 diabetes mellitus substantially increases the lifetime risk of both developing and dying from heart failure. While this appears to be explained in part by the well-known association of diabetes with hypertension, dyslipidemia, and coronary atherosclerosis, additional pathophysiologic mechanisms linking type 2 diabetes and heart failure have recently been suggested. These include the potentially adverse effects of hyperglycemia on endothelial function and redox state, effects of excess circulating glucose and fatty acids on cardiomyocyte ultrastructure, intracellular signaling and gene expression, and the possibility that diabetes may impair recruitment of the myocardial insulin-responsive glucose transport system in response to ischemia. Because many of these putative pathophysiologic mechanisms should be amenable to normalization of the diabetic metabolic milieu, strategies designed to more carefully control circulating levels of glucose and fatty acids might conceivably delay or prevent the development of heart failure.