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A Pacing-Controlled Procedure for the Assessment of Heart Rate-Dependent Diastolic Functions in Murine Heart Failure Models
Published on: July 21, 2023
The failing diabetic heart: focus on diastolic left ventricular dysfunction
Loek van Heerebeek1, Aernout Somsen, Walter J Paulus
1Laboratory of Physiology, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
Current Diabetes Reports
|February 5, 2009
Summary
Diabetes mellitus (DM) causes heart failure (HF) by increasing left ventricular (LV) diastolic stiffness. Pathophysiology differs between HF with normal ejection fraction (HFNEF) and reduced ejection fraction (HFREF) in diabetic patients.
Area of Science:
- Cardiology
- Endocrinology
- Pathophysiology
Background:
- Diabetes mellitus (DM) is a prevalent condition and a significant risk factor for heart failure (HF).
- Increased left ventricular (LV) diastolic stiffness is an early indicator of LV dysfunction in diabetic patients, but its underlying mechanisms are not fully understood.
- Understanding these mechanisms is crucial for developing new therapeutic strategies to reduce high HF mortality in diabetic populations.
Purpose of the Study:
- To investigate the distinct pathophysiological mechanisms contributing to increased LV diastolic stiffness in diabetic patients with different types of heart failure.
- To differentiate the contributors to LV diastolic stiffness in HF with normal LV ejection fraction (HFNEF) versus HF with reduced LVEF (HFREF) in the context of diabetes.
Main Methods:
- This study reviews and synthesizes existing research on the pathophysiology of diabetic cardiomyopathy.
- It focuses on the mechanisms leading to increased LV diastolic stiffness in both HFNEF and HFREF.
- The review differentiates the roles of fibrosis, advanced glycation end products (AGEs), and cardiomyocyte resting tension.
Main Results:
- In diabetic HFREF, fibrosis and advanced glycation end products (AGEs) are key contributors to elevated LV diastolic stiffness.
- In diabetic HFNEF, increased resting tension of hypertrophied cardiomyocytes is the primary driver of high LV diastolic stiffness.
- These distinct mechanisms highlight the heterogeneity of diabetic cardiomyopathy.
Conclusions:
- The pathophysiology of increased LV diastolic stiffness in diabetic heart failure is complex and differs based on ejection fraction.
- Fibrosis and AGEs dominate in HFREF, while cardiomyocyte resting tension is key in HFNEF.
- Targeting these specific mechanisms may offer novel therapeutic avenues for managing heart failure in diabetic patients.
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