Body mass index as a predictor of the presence but not the severity of coronary artery disease

Home of Kyle J. Norton for The Better of Living & Living Health Obesity is defined as a medical condition of excess body fat has accumulated overtime, while overweight is a condition of excess body weight relatively to the height. According to the Body Mass Index(BMI), a BMI between 25 to 29.9 is considered over weight, while a BMI of over 30 is an indication of obesity. According to the statistic, 68% of American population are either overweight or obese. Clinically Overweight and obesity are defined indicators of a disease process characterized by the accumulation of body fat due to an excess of energy intake (nutritional intake) relative to energy expenditure (physical activity)(a).
Ischemic heart disease is defined as a condition of  reduced blood supply of the heart muscle, as a result of  coronary artery disease caused by plague building up in the arteries.
Body mass index as a predictor of the presence but not the severity of coronary artery disease
In the study to evaluate the correlation between BMI and CAD extension documented by coronary computed tomography angiography (CCTA), indicated that in 319 patients (4516 segments; 4077 evaluable), a detailed atherosclerotic burden was evaluated and compared among BMI classes, defined according to the presence of plaque and the degree of stenosis. Obstructive CAD was identified in 16.9% of the patients and 45.1% had non-obstructive CAD. The discriminative threshold for high burden, established by the segment involvement score (SIS), was >5 segments with plaque (15.4% patients). The prevalence of SIS >5 among the BMI classes was: 18.7%, 13.7% and 13.6% for normal, overweight and obesity respectively (p values for the specific classes versus all other patients: 0.241, 0.450 and 0.663)(8).
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Sources
(8) http://www.ncbi.nlm.nih.gov/pubmed/23774273 http://medicaladvisorjournals.blogspot.com