Author(s): Seyfeli E, Duru M, Kuvandik G, Kaya H, Yalcin F
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Abstract OBJECTIVE: The aim of this study was to investigate the effect of obesity on dispersion of P-wave duration and QTc interval in obese women. METHODS: Forty-two obese women (Body mass index (BMI)=40+/-3 kg/m(2), mean age 45+/-9 years) and compared age-matched (BMI=22+/-1 kg/m(2), mean age 41+/-6 years) twenty-five non-obese women were included in our study. Maximum and minimum P-wave duration, P-wave dispersion (difference between the maximum and the minimum P-wave duration), maximum and minimum QTc interval, and QTc dispersion (the difference between the maximum and the minimum QTc interval) were measured from 12-lead ECG. ECG's were transferred to a personal computer via a scanner and then used for magnification of 400 times by Adobe Photoshop software. RESULTS: There was significant difference in BMI (40+/-3 vs 22+/-1 kg/m(2), P<0.001, respectively) between obese and non-obese women. Obese women had higher Max. P-wave duration (116+/-11 vs 94+/-14 ms, P<0.001), P-wave dispersion (51+/-15 vs 26+/-11 ms, P<0.001), Max. QTc interval (449+/-38 vs 419+/-30 ms, P<0.001) and QTc dispersion (57+/-23 vs 38+/-15 ms, P<0.001) compared to non-obese women. A significant correlation was found between BMI and Max. P-wave duration (r=0.584, P<0.001), P-wave dispersion (r=0.621, P<0.001), Max. QTc interval (r=0.410, P<0.001), and QTc dispersion (r=0.429, P<0.001). In the linear regression analysis, compared to co-morbidity factors such as age, hypertension, diabetes mellitus and smoking, there was significant association between only BMI and electrocardiographic values (P-wave and QTc dispersion). CONCLUSION: We concluded that obesity caused significant increase in P-wave and QTc dispersion. Therefore, obese women may not only be under the risk of ventricular arrhythmias, but also they may under the risk of atrial arrhythmias.
This article was published in Int J Obes (Lond)
and referenced in Journal of Molecular and Genetic Medicine