Estimating fat mass in heart failure patients

Area of Science:

• Cardiology
• Body Composition Analysis
• Medical Imaging

Background:

• Current body composition (BC) assessments in heart failure (HF) patients rely on basic anthropometry.
• Advanced methods like dual energy X-ray absorptiometry (DXA), bioelectrical impedance spectroscopy (BIS), and air displacement plethysmography (ADP) require comparison for HF populations.

Purpose of the Study:

• To compare BC assessments using basic anthropometry, DXA, BIS, and ADP in HF patients.
• To evaluate the accuracy of these methods in estimating fat mass (FM) and fat-free mass (FFM).

Main Methods:

• A single-center, observational pilot study included 52 HF patients and 20 healthy controls.
• DXA served as the reference standard for FM and FFM measurements.
• Comparisons were made between DXA and anthropometry, ADP, and BIS.

Main Results:

• Body density showed a strong inverse correlation with DXA-measured FM (r = -0.87).
• ADP demonstrated high concordance with DXA for both FM (r = 0.76) and FFM (r = 0.93).
• BIS showed acceptable agreement with DXA for FM (r = 0.69) and FFM (r = 0.73).

Conclusions:

• Body density is a practical surrogate for estimating FM in HF.
• ADP is suitable for estimating FM and FFM in HF patients.
• BIS provides acceptable estimates for FM in HF with reduced ejection fraction (HFrEF) and FFM in HF with preserved ejection fraction (HFpEF).