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T-wave morphology abnormalities in the STREAM stage 1 trial. | LitMetric

AI Article Synopsis

Article Abstract

Background: Shorter regimens for drug-resistant tuberculosis (DR-TB) have non-inferior efficacy compared with longer regimens, but QT prolongation is a concern. T-wave morphology abnormalities may be a predictor of QT prolongation.

Research Design And Methods: STREAM Stage 1 was a randomized controlled trial in rifampicin-resistant TB, comparing short and long regimens. All participants had regular ECGs. QT/QTcF prolongation (≥500 ms or increase in ≥60 ms from baseline) was more common on the short regimen which contained high-dose moxifloxacin and clofazimine. Blinded ECGs were selected from the baseline, early (weeks 1-4), and late (weeks 12-36) time points. T-wave morphology was categorized as normal or abnormal (notched, asymmetric, flat-wave, flat peak, or broad). Differences between groups were assessed using Chi-Square tests (paired/unpaired, as appropriate).

Results: Two-hundred participants with available ECGs at relevant times were analyzed (QT prolongation group  = 82; non-prolongation group  = 118). At baseline, 23% (45/200) of participants displayed abnormal T-waves, increasing to 45% (90/200,  < 0.001) at the late time point. Abnormalities were more common in participants allocated the Short regimen (75/117, 64%) than the Long (14/38, 36.8%,  = 0.003); these occurred prior to QT/QTcF ≥500 ms in 53% of the participants (Long 2/5; Short 14/25).

Conclusions: T-wave abnormalities may help identify patients at risk of QT prolongation on DR-TB treatment.

Trial Registration: The trial is registered at ClinicalTrials.gov (CT.gov identifier: NCT02409290). Current Controlled Trial number, ISRCTN78372190.

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http://dx.doi.org/10.1080/14740338.2024.2322116DOI Listing

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