Effects of isolated obesity on systolic and diastolic left ventricular function

被引:235
作者
Pascual, M
Pascual, DA
Soria, F
Vicente, T
Hernández, AM
Tébar, FJ
Valdés, M
机构
[1] Univ Hosp Virgen Arrixaca, Endocrinol & Nutr Dept, Murcia, Spain
[2] Univ Hosp Virgen Arrixaca, Dept Cardiol, Murcia, Spain
[3] Gen Univ Hosp, Dept Cardiol, Murcia, Spain
关键词
D O I
10.1136/heart.89.10.1152
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background: Obesity is associated with increased cardiovascular morbidity and mortality. A direct effect of isolated obesity on cardiac function is not well established. Objective: To determine the direct effect of different grades of isolated obesity on echocardiographic indices of systolic and diastolic left ventricular function. Methods: 48 obese and 25 normal weight women were studied. They had no other pathological conditions. Obesity was classed as slight (n = 17; body mass index (BMI) 25-29.9 kg/m(2)), moderate (n = 20; BMI 30-34.9 kg/m(2)), or severe (n = 11; BMI greater than or equal to 35 kg/m(2)). Echocardiographic indices of systolic and diastolic function were obtained, and dysfunction was assumed when at least two values differed by greater than or equal to 2 SD from the normal weight group. Results: Ejection fraction (p < 0.05), fractional shortening (p < 0.05), and mean velocity of circumferential shortening (p < 0.05) were increased in slight and moderate obesity. Left ventricular dimensions were increased (p < 0.001) but relative wall thickness was unchanged. No obese patients met criteria for systolic dysfunction. In obese subjects, the mitral valve pressure half time (p < 0.01) and the left atrial diameter (p < 0.001) were increased and the deceleration slope was decreased (p < 0.01); all other diastolic variables were unchanged. No differences were found between obesity subgroups. Subclinical diastolic dysfunction was more prevalent among obese subjects (p = 0.002), being present in two with slight obesity (12%), seven with moderate obesity (35%), and five with severe obesity (45%). BMI correlated significantly with indices of left ventricular function. Conclusions: Subclinical left ventricular diastolic dysfunction is present in all grades of isolated obesity, correlates with BMI, and is associated with increased systolic function in the early stages of obesity.
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页码:1152 / 1156
页数:5
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