QT Dispersion in Healthy Adult Nigerians

Area of Science:

• Cardiology
• Electrophysiology
• Public Health

Background:

• Increased QT dispersion (QTd) is linked to higher cardiovascular morbidity and mortality.
• Understanding QTd in healthy populations is crucial for risk stratification.

Purpose of the Study:

• To determine the mean QTd in healthy Nigerian adults.
• To characterize QTd in relation to demographic and cardiac parameters.

Main Methods:

• 100 healthy Nigerian adults underwent resting 12-lead ECG.
• QTc, QTd, and ECG-defined left ventricular hypertrophy (LVH) were assessed.
• Echocardiography evaluated LV function and mass in 60 subjects.

Main Results:

• Mean QTd was 38.5 ± 11.2ms, ranging from 15-70ms.
• QTd showed no significant association with age, sex, heart rate, blood pressure, BMI, QTc, LVH, or LV systolic function.

Conclusions:

• QT dispersion in healthy adult Nigerians is not influenced by demographic factors.
• LV systolic function and LV hypertrophy do not affect QT dispersion in this cohort.