Relationship between body composition and left ventricular geometry using three dimensional cardiovascular magnetic...

Area of Science:

• Cardiology
• Cardiovascular Imaging
• Body Composition Analysis

Background:

• Obesity is linked to left ventricular (LV) mass and volume changes, but remodeling patterns vary.
• Understanding the relationship between body composition and LV geometry is crucial for prognostic significance.

Purpose of the Study:

• To define the relationship between body composition and LV geometry.
• To utilize three-dimensional cardiovascular magnetic resonance (3D CMR) for detailed analysis.

Main Methods:

• An observational study of 1530 volunteers without known cardiovascular disease.
• 3D CMR imaging with atlas-based segmentation to model LV wall thickness (WT) and relative wall thickness (RWT).
• 3D regression models assessed body composition's impact on LV geometry, adjusted for covariates.

Main Results:

• LV mass positively correlated with fat mass in women, but not men.
• In men, fat mass strongly associated with concentric RWT increase (96% LV area) and reduced cavity.
• Women showed weaker concentric hypertrophy and an inverse RWT-fat mass relationship in the basal lateral wall.

Conclusions:

• Increasing body fat is associated with asymmetric concentric hypertrophy, independent of blood pressure.
• Women exhibit greater LV cavity dilatation compared to men.
• Standard measurements may underestimate body composition's effect on LV structure due to varied remodeling.