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. 2003 Oct;89(10):1152-6.
doi: 10.1136/heart.89.10.1152.

Effects of isolated obesity on systolic and diastolic left ventricular function

M Pascual  1 , D A Pascual, F Soria, T Vicente, A M Hernández, F J Tébar, M Valdés
Affiliations

Effects of isolated obesity on systolic and diastolic left ventricular function

M Pascual et al. Heart. 2003 Oct.

Abstract

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/m2), moderate (n = 20; BMI 30-34.9 kg/m2), or severe (n = 11; BMI > or = 35 kg/m2). Echocardiographic indices of systolic and diastolic function were obtained, and dysfunction was assumed when at least two values differed by > or = 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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Figures

Figure 1
Figure 1
Prevalence of subclinical diastolic dysfunction in the obesity subgroups.
See this image and copyright information in PMC

Comment in

  • Cardiac function and obesity.
    Vasan RS. Vasan RS. Heart. 2003 Oct;89(10):1127-9. doi: 10.1136/heart.89.10.1127. Heart. 2003. PMID: 12975393 Free PMC article. No abstract available.

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