P386 OBESITY AND CARDIOMYOPATHY

Abstract

Abstract Background Obesity cardiomyopathy is a heart failure unexplained by others etiologies that can vary from a subclinical left ventricular dysfunction to overt dilated cardiomyopathy. Aim To evaluate the changes in echocardiogram in both normotensive and hypertensive obese and to evaluate obesity and/or hypertension impact on cardiomyopathy. Methods 383 subjects (236F–147M) were enrolled. They were divided into two groups based on BMI: non–obese subjects (BMI<30kg/m2) and obese subjects (BMI>30kg/m2). The obese subjects were divided in different degrees (groups) of obesity according with obesity classification: group 1= BMI >30<35, 2= BMI >35<40, 3= BMI >40 kg/m2. 208 of 383 enrolled subjects were hypertensive. All subjects underwent to an echocardiogram with evalutation of left atrial diameter (LAD), left ventricular end–diastolic diameter (LVEDD), left ventricular end–systolic diameter (LVESD), ventricular septum, cardiac mass and left ventricular mass index (LVMI). Results Obese subjects showed a progressive increase in left atrial diameter (LAD)(P = 0.000), left ventricular end–diastolic diameter (LVEDD)(P = 0.000), left ventricular end–systolic diameter (LVESD)(P = 0.001), ventricular septum (P = 0.000) and cardiac mass (P = 0.000) according to the degree of obesity. Subjects in the 3° group of obesity showed higher value of LAD and LVESD when compared with subjects in first two groups (P = 0.000; P = 0.032; P = 0.000; P = 0.001, respectively). Similarly, subjects in the 3° group of obesity showed higher value of ventricular septum and cardiac mass when compared with the first two groups of obesity (P = 0.005; P = 0.002; P = 0.000; P = 0.005; respectively). LAD, LVEDD, LVESD, ventricular septum and cardiac mass were positively related with the obesity degree. In order to avoid that echocardiographic modifications were caused by hypertension, data were adjusted for hypertension so linear regression documented that degree of obesity predicts echocardiographic changes (LAD, LVEDD, LVESD) better than hypertension. Conclusions Our data suggested that the in obese subjects the severity of cardiomyopathy is correlated with degree of obesity and that the degree of obesity is a better predictor than hypertension for echocardiographic changes.