Population Prevalence and Correlates of Prolonged QT Interval: Cross-Sectional, Population-Based Study From Rural Uganda.

Autor:	Magodoro IM; Harvard Medical School, Boston, MA, USA; Massachusetts General Hospital, Boston, MA, USA; University of Cape Town, Cape Town, South Africa. Electronic address: Itai_Magodoro@hms.harvard.edu., Albano AJ; Michigan State University School of Medicine, East Lansing, MI, USA., Muthalaly R; Harvard Medical School, Boston, MA, USA; Arrhythmia Service, Cardiovascular Division, Brigham and Women's Hospital, Boston, MA, USA., Koplan B; Harvard Medical School, Boston, MA, USA; Arrhythmia Service, Cardiovascular Division, Brigham and Women's Hospital, Boston, MA, USA., North CM; Harvard Medical School, Boston, MA, USA; Massachusetts General Hospital, Boston, MA, USA., Vořechovská D; Massachusetts General Hospital, Boston, MA, USA., Downey J; Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA., Kraemer J; Department of Health Systems Administration, Georgetown University, Washington, DC, USA., Vaglio M; Analyzing Medical Parameters for Solutions, LLC, New York, NY, USA., Badilini F; Analyzing Medical Parameters for Solutions, LLC, New York, NY, USA., Kakuhire B; Mbarara University of Science and Technology, Mbarara, Uganda., Tsai AC; Harvard Medical School, Boston, MA, USA; Massachusetts General Hospital, Boston, MA, USA; Analyzing Medical Parameters for Solutions, LLC, New York, NY, USA., Siedner MJ; Harvard Medical School, Boston, MA, USA; Massachusetts General Hospital, Boston, MA, USA; Mbarara University of Science and Technology, Mbarara, Uganda; Africa Health Research Institute, KwaZulu-Natal, South Africa.
Jazyk:	angličtina
Zdroj:	Global heart [Glob Heart] 2019 Mar; Vol. 14 (1), pp. 17-25.e4. Date of Electronic Publication: 2018 Dec 21.
DOI:	10.1016/j.gheart.2018.11.002
Abstrakt:	Objectives: We aimed to estimate the prevalence and correlates of QT interval prolongation in rural Uganda. Background: Major electrocardiographic abnormalities, including prolonged QT interval, have been shown to be independently predictive of adverse cardiovascular events among Western populations. Cardiovascular diseases are on the rise in sub-Saharan Africa with poorly characterized context-specific risk factors. An important question is whether ECG screening might have value in cardiovascular disease risk stratification in SSA. Methods: We conducted a cross-sectional survey in a sample of adults participating in an ongoing whole-population cohort in Mbarara, Uganda, in 2015. Of 1,814 subjects enrolled in the parent whole-population cohort, 856 (47%) participated in the study. Participants completed 12-lead electrocardiography and cardiovascular disease risk factors assessment. We summarized sex-specific, heart rate variation-adjusted QT (QTa) defining prolonged QTa as >460 ms in women and >450 ms in men. We fit linear and logistic regression models to estimate correlates of (continuous) QTa interval length and (dichotomous) prolonged QTa. Models included inverse probability of sampling weights to generate population-level estimates accounting for study nonparticipation. Results: We assessed data from 828 participants with electrocardiograms. The weighted population mean age was 38.4 years (95% confidence interval: 36.3-40.4). The weighted population was 50.4% female, 11.5% had elevated blood pressure, and 57.6% had a high-sensitivity C-reactive protein >1 mg/dl. The population mean QTa was 409.1 ms (95% confidence interval: 405.1-413.1), and 10.3% (95% confidence interval: 7.8-13.5) met criteria for prolonged QTa. Women had a higher mean QTa (421.6 ms vs. 396.3 ms; p < 0.001), and a higher proportion of women had a prolonged QTa (14.0% vs. 9.3%; p = 0.122) than did men. In multivariable-adjusted regression models, female sex and hypertension correlated with higher mean QTa and meeting criteria for prolonged QTa, respectively. Conclusions: QT interval prolongation is highly prevalent in rural Uganda and may be more common than in high-income settings. Female sex, age, and high blood pressure correlated with QT interval prolongation. Future work should assess whether genetic predisposition or environmental factors in sub-Saharan African populations contribute to prolonged QT and clarify consequences. (Copyright © 2019 World Heart Federation (Geneva). Published by Elsevier B.V. All rights reserved.)
Databáze:	MEDLINE
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