QT Dispersion in Healthy Adult Nigerians.
BACKGROUND
Increase in QT dispersion (QTd) is associated with an increased risk of cardiovascular morbidity and mortality.


OBJECTIVE
This study sought to (i) determine the mean QTd and (ii) characterise QTd in a healthy Nigerian population.


METHODS
One hundred healthy Nigerian adults were studied. Healthy status of the subjects was determined by history and physical examination. A resting 12- lead ECG was obtained from all subjects for determination of QTc, QTd and ECG left ventricular hypertrophy (LVH) using Sokolow Lyon (SL) and Araoye's codes. Echocardiography was used to determine LV systolic function, LVM and LVMI for 60 subjects.


RESULTS
The QTd ranged from 15-70ms with a mean value of 38.5 ± 11.2ms. QTd was independent of age (p = 0.86), sex (p = 0.97), heart rate (p = 0.22), blood pressure (p > 0.05), BMI (p = 0.81), QTc (p = 0.41), LVH (ECG and echo) and LV systolic function (p > 0.05).


CONCLUSIONS
QT dispersion is independent of demographic parameters, LV systolic function and LV hypertrophy in healthy adult Nigerians.
Department of Medicine, College of Medicine, University of Lagos/ Lagos University Teaching Hospital, Lagos. oale@unilag.edu.ng
O K
OK
Ale
J N A
JN
Ajuluchukwu
D A
DA
Oke
A C
AC
Mbakwem
D000328:Adult; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009549:Nigeria / Q000453:epidemiology; D012307:Risk Factors