Obesity does not influence electrocardiographic parameters in coronary patients.

Although elevated body mass index (BMI) was found to be associated with QT prolongation in healthy subjects, electrocardiographic findings in coronary patients in relation to BMI have not been investigated. We studied 936 coronary patients whose electrocardiographic parameters were compared according to their BMI and found that BMI did not affect the overall QT duration, but QT dispersion was significantly higher in normal-weight coronary patients than in obese patients.