Right ventricular remodelling in systemic hypertension: a cardiac MRI study

Area of Science:

• Cardiology
• Cardiovascular Imaging
• Hypertension Research

Background:

• Systemic hypertension significantly impacts the right ventricle, but its effects are understudied due to imaging challenges.
• Conventional imaging techniques struggle with the right ventricle's complex shape and orientation.

Purpose of the Study:

• To investigate if mild to moderate hypertension alters right ventricular structure and function.
• To compare right and left ventricular changes in hypertensive individuals.
• To utilize cardiac MRI for precise ventricular evaluation.

Main Methods:

• Compared 25 untreated hypertensive patients with 24 normotensive controls.
• Measured wall thickness, ventricular mass, end-diastolic volumes, early peak filling rate, and ejection fraction in both ventricles.
• Calculated the remodeling index (ventricular mass/end-diastolic volume) for concentricity.

Main Results:

• Hypertensive subjects showed increased right ventricular mass, wall thickness, and remodeling index.
• Reduced peak filling rate in hypertensives indicated impaired diastolic relaxation.
• Significant correlations between mass, filling rate, and ejection fraction were observed in both ventricles.

Conclusions:

• Systemic hypertension is linked to concentric right ventricular remodeling and diastolic dysfunction.
• The right ventricle is not immune to the adverse effects of hypertension.
• Right and left ventricular adaptations to hypertension show parallel changes.