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Adapted Changes in Left Ventricular Structure and Function in Severe Uncomplicated Obesity
Article first published online: 6 SEP 2012
2004 North American Association for the Study of Obesity (NAASO)
Volume 12, Issue 10, pages 1616–1621, October 2004
How to Cite
Iacobellis, G., Ribaudo, M. C., Zappaterreno, A., Iannucci, C. V., Di Mario, U. and Leonetti, F. (2004), Adapted Changes in Left Ventricular Structure and Function in Severe Uncomplicated Obesity. Obesity Research, 12: 1616–1621. doi: 10.1038/oby.2004.201
- Issue published online: 6 SEP 2012
- Article first published online: 6 SEP 2012
- Received for review October 02, 2003; Accepted in final form July 21, 2004
- severe obesity;
- uncomplicated obesity;
- left ventricular hypertrophy;
- left ventricular geometry
Objective: A massive amount of fat tissue, as that observed in obese subjects with BMI over 50 kg/m2, could affect cardiac morphology and performance, but few data on this issue are available. We sought to evaluate cardiac structure and function in uncomplicated severely obese subjects.
Research Methods and Procedures: We studied 55 uncomplicated severely obese patients, 40 women, 15 men, mean age 35.5 ± 10.2 years, BMI 51.2 ± 8.8 kg/m2, range 43 to 81 kg/m2, with a history of fat excess of at least 10 years, and 55 age-matched normal-weight subjects (40 women, 15 men, mean BMI 23.8 ± 1.2 kg/m2) as a control group. Each subject underwent an echocardiogram to evaluate left ventricular (LV) mass and geometry and systolic and diastolic function.
Results: Severely obese subjects showed greater LV mass and indexed LV mass than normal-weight subjects (p < 0.01 for all parameters). Nevertheless, LV mass was appropriate for sex, height2.7, and stroke work in most (77%) uncomplicated severely obese subjects. In addition, no significant difference in LV mass indices and LV mass appropriateness between obese subjects with BMI ≥ 50 kg/m2 and those with BMI ≤ 50 kg/m2 was found. Obese subjects also showed higher ejection fraction and midwall shortening than normal-weight subjects (p = 0.05 and p < 0.01, respectively), suggesting a hyperdynamic systolic function. No significant difference in systolic performance between obese subjects with BMI ≥ 50 kg/m2 and those with BMI ≤ 50 kg/m2 was seen.
Discussion: Our data show that uncomplicated severe obesity, despite the massive fat tissue amount, is associated largely with adapted and appropriate changes in cardiac structure and function.