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Journal of the National Medical Association logoLink to Journal of the National Medical Association
. 2006 Apr;98(4):631–636.

QT dispersion in adult hypertensives.

Isa Muhammad Sani 1, Danbauchi Sulei Solomon 1, Oyati Albert Imhogene 1, Alhassan Muhammad Ahmad 1, Garko Sani Bala 1
PMCID: PMC2569239  PMID: 16623077

Abstract

Increased QT dispersion is associated with sudden cardiac death in congestive cardiac failure, hypertrophic cardiomyopathy and following myocardial infarction. Patients with hypertension--in particular, those with left ventricular hypertrophy (LVH)--are also at greater risk of sudden cardiac death. We examined whether QT dispersion, which is easily obtained from a routine ECG, correlates with LVH. One-hundred untreated patients with systemic hypertension and 78 normotensives had QT dispersion measured manually from a surface 12-lead electrocardiogram and two-dimensional echocardiography performed to measure interventricular septal thickness, posterior wall thickness and left ventricular internal diameter. Office blood pressure was also recorded. Multivariate analysis demonstrated significant relationships between QT dispersion and office systolic blood pressure, and left ventricular mass index. Manual measurement of QT dispersion might be a simple, noninvasive screening procedure to identify those hypertensives at greatest risk of sudden cardiac death in a third-world country.

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Selected References

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