Is the Wrist Bone Connected to Heart Risk?
- Filed under: Health News
- Date: Apr 12,2011
Measuring the wrist bone may be a new way to identify which overweight children and adolescents face an increased risk of developing cardiovascular disease, according to research in Circulation: Journal of the American Heart Association.
“This is the first evidence that wrist circumference is highly correlated to evidence of insulin resistance,” said Raffaella Buzzetti, M.D., senior study author and professor in the Department of Clinical Sciences at “Sapienza” University of Rome, Italy. “Wrist circumference is easily measured and if our work is confirmed by future studies, wrist circumference could someday be used to predict insulin resistance and cardiovascular disease risk.”
In a study of 477 overweight/obese children and adolescents (average age 10), researchers found that wrist circumferences accounted for 12 percent to 17 percent of the total variance of insulin resistance. Insulin resistance is explained only by the size of the wrist’s bony tissue and not by the fatty tissue, the researchers said.
Many studies have shown that atherosclerotic cardiovascular disease — caused by narrowing of the arteries — begins to develop in childhood. Insulin resistance, a condition in which the body makes insulin but can’t use it efficiently to break down blood sugar, is a metabolic risk factor for later development of cardiovascular disease.
Higher insulin levels increase the risk of developing insulin resistance, which in turn increases the risk of developing cardiovascular disease. Although excess body fat is linked to several heart disease risk factors including insulin resistance, measuring body fat in children is problematic partly because of how rapidly their bodies change during puberty, researchers said.
The researchers sought an easy way for doctors to identify young people at greatest risk. They measured wrist circumference manually with a cloth tape measure and a subset of 51 of the children also underwent a painless imaging technique called nuclear magnetic resonance for precise measuring of the bony area vs. fatty area of the wrist. “We decided to use a parameter traditionally connected to the frame size, reversing its traditional use as a correction factor for BMI,” said co-lead authors Marco Capizzi, M.D. and Gaetano Leto, M.D., Ph.D. Read the rest of this entry »