Fat Loss, Not Weight Loss Reduces Heart Failure Risk: Circul
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Reducing the level of body fat and waist size are linked to a lower risk of heart failure in patients with type 2 diabetes, a study led by UT Southwestern researchers indicates. The findings, reported in Circulation, suggest that all weight loss isn't equal when it comes to mitigating the risk of heart disease.

The burden of diabetes is increasing, with an estimated 700 million adults worldwide predicted to have this disease by 2045. The vast majority of cases are type 2 diabetes, characterized by insulin resistance, an inability for cells to respond to insulin. Type 2 diabetes doubles the risk of cardiovascular events such as heart failure and heart attacks.

Being overweight and obese are strong risk factors for both type 2 diabetes and heart disease, and patients are often counseled to lose weight to reduce the likelihood of developing both conditions. However, not all weight loss is the same, explains author of the study.

Fat mass accounts for fat in different parts of the body while lean mass is mostly muscle.

Understanding the relationship between heart disease and body composition has proven especially challenging, author explains, because there hasn't been an easy and inexpensive way to evaluate body composition. The gold standard of determining fat mass and lean mass is to measure it directly with tools like dual-energy X-ray absorptiometry (DXA), a scan that's cumbersome, expensive, and exposes patients to radiation.

To help answer how different types of weight loss can affect cardiovascular disease, researchers used data from the Look AHEAD (Action for Health in Diabetes) Trial, which investigated the effects of either an intense lifestyle intervention focused on weight loss and physical activity or diabetes support and education in more than 5,000 overweight or obese adults with type 2 diabetes. The study collected information on the volunteers' weight, body composition, and waist circumference at the baseline and again one and four years later. It also tracked the incidence of heart failure in this group over a 12-year period.

The Look AHEAD Trial determined body composition with DXA. But Pandey and his colleagues used a new equation that incorporates age, sex, race/ethnicity, height, body weight, and waist circumference to estimate fat and lean mass - producing results that closely matched those from DXA scans.

Among the 5,103 participants in the Look AHEAD Trial, 257 developed heart failure over the follow-up period. Pandey and his colleagues found that the more these volunteers lowered their fat mass and waist circumference, the lower were their chances of developing heart failure.

Just a 10 percent reduction in fat mass led to a 22 percent lower risk of heart failure with preserved ejection fraction and a 24 percent lower risk of heart failure with reduced ejection fraction, two subtypes of this condition. A decline in waist circumference significantly lowered the risk of heart failure with preserved injection fraction but not heart failure with reduced ejection fraction. However, a decline in lean mass didn't change the risk of heart failure at all.

Source: https://www.aninews.in/news/health/study-suggests-losing-fat-mass-but-not-lean-mass-key-for-heart-health-in-obese-patients-with-type-2-diabetes20201110075246/