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Updated: Jul 18, 2026

A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats
Published on: December 2, 2016
Cardioreparation in hypertensive heart disease
1Division of Cardiovascular Diseases, Department of Medicine, University of Tennessee Health Science Center, Memphis, USA. KTWeber@utmem.edu
Insights
Hypertensive heart disease (HHD) involves adverse cardiac remodeling, not just cell quantity. Targeting this structural remodeling with cardioprotective agents is crucial for reducing heart failure risk.
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Pathology
Background:
- Normal myocardium comprises myocytes and non-cardiomyocytes within an extracellular matrix.
- Ventricular hypertrophy involves myocyte growth, while hypertensive heart disease (HHD) includes both myocyte and nonmyocyte growth.
- HHD leads to adverse structural remodeling of coronary vasculature and matrix, impacting myocardial quality and increasing cardiovascular event risk.
Purpose of the Study:
- To highlight the importance of targeting adverse structural remodeling in hypertensive heart disease (HHD).
- To emphasize that myocardial quality, not just quantity, dictates cardiovascular event risk in HHD.
- To discuss the role of cardioprotective and cardioreparative agents in managing HHD.
Main Methods:
- Review of the physiological mechanisms underlying myocardial structure and remodeling in HHD.
- Analysis of the balance between stimulatory and inhibitory signals regulating cardiac cell growth and matrix turnover.
- Evaluation of the therapeutic potential of pharmacological interventions, including ACE inhibitors.
Main Results:
- Hypertensive heart disease (HHD) is characterized by adverse structural remodeling of the heart, affecting both cellular and matrix components.
- The equilibrium between stimulatory and inhibitory signaling pathways is disrupted in HHD, promoting pathological growth and remodeling.
- Pharmacological interventions, particularly ACE inhibition, demonstrate efficacy in reversing structural abnormalities and improving cardiac function.
Conclusions:
- Effective management of hypertension requires addressing not only blood pressure but also the underlying adverse structural remodeling.
- Cardioprotective and cardioreparative agents are essential for counteracting the detrimental effects of HHD.
- Targeting structural remodeling offers a promising strategy to reduce the risk of heart failure and sudden cardiac death in patients with HHD.
Abstract:
The normal myocardium is composed of a variety of cells. Cardiac myocytes, tethered within an extracellular matrix of fibrillar collagen, represent one third of all cells; noncardiomyocytes account for the remaining two thirds. Ventricular hypertrophy involves myocyte growth. Hypertensive heart disease (HHD) includes myocyte and nonmyocyte growth that leads to an adverse structural remodeling of the intramural coronary vasculature and matrix. In HHD, it is not the quantity of myocardium but rather its quality that accounts for increased risk of adverse cardiovascular events. Structural homogeneity of cardiac tissue is governed by a balanced equilibrium existing between stimulator and inhibitor signals that regulate cell growth, apoptosis, phenotype, and matrix turnover. Stimulators (eg, angiotensin II, aldosterone, and endothelins) are normally counterbalanced by inhibitors (eg, bradykinin, NO, and prostaglandins) in a paradigm of reciprocal regulation. To reduce the risk of heart failure and sudden cardiac death that accompanies HHD, its adverse structural remodeling must be targeted for pharmacologic intervention. Cardioprotective agents counteract the imbalance between stimulators and inhibitors. They include ACE and endopeptidase inhibitors and respective receptor antagonists. Cardioreparative agents reverse the growth-promoting state and regress existing abnormalities in coronary vascular and matrix structure. ACE inhibition has achieved this outcome with favorable impact on vasomotor reactivity and tissue stiffness. Today's management of hypertension should not simply focus on a reduction in blood pressure, it must also target the adverse structural remodeling that begets HHD.
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