Left ventricular geometry in obesity: Is it what we expect?

Area of Science:

• Cardiology
• Obesity Medicine
• Physiology

Background:

• Obesity involves disproportionate growth in adipose and lean mass.
• Left ventricular (LV) hypertrophy is common in obesity, driven by hemodynamic and non-hemodynamic factors.
• Visceral fat activity and body composition contribute to cardiac workload.

Purpose of the Study:

• To review the pathophysiology and prevalence of LV hypertrophy in obesity.
• To examine LV geometric abnormalities associated with obesity.
• To explore the relationship between body size and LV hypertrophy.

Main Methods:

• Review of existing literature on obesity and cardiac function.
• Analysis of studies focusing on LV geometry in obese populations.
• Examination of the interplay between body composition, visceral fat, and myocardial structure.

Main Results:

• Cardiomyocyte hypertrophy results from hemodynamic load via sarcomeric replication.
• Non-muscular myocardial components, including interstitial fat and triglycerides, also increase.
• These non-muscular changes influence LV geometric patterns and hypertrophy.

Conclusions:

• LV hypertrophy in obesity is multifactorial, involving both muscle and non-muscle components.
• Interventions targeting only hemodynamic load may not effectively reduce LV hypertrophy.
• Understanding body composition and fat distribution is crucial for managing LV hypertrophy in obesity.