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Sökning: WFRF:(Mårtensson Andreas 1963 ) > Annan publikation

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  • Mhamilawa, Lwidiko E, 1988-, et al. (författare)
  • Electrocardiographic safety evaluation of a prolonged artemether-lumefantrine treatment in patients with uncomplicated Plasmodium falciparum malaria in Bagamoyo District, Tanzania.
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    •  Background:Extended artemisinin-based combination therapy (ACT) for treatment of uncomplicated Plasmodium falciparum malaria with already existing drug regimens such as artemether-lumefantrine, might be effective in tackling the emerging ACT resistance. However, given the history of cardiotoxicity among antimalarial drugs structurally similar to lumefantrine, the potential effect of extended artemether-lumefantrine treatment on the electrocardiographic (ECG) QTc interval is of high concern. Method: Male and non-pregnant females aged 1–65 years, diagnosed with uncomplicated P. falciparum malaria in Bagamoyo district, Tanzania, were randomized into two arms. The intervention arm received an extended, i.e. 6-day, course of artemether-lumefantrine and an additional single low-dose primaquine (0.25 mg/kg) administered together with the last artemether-lumefantrine dose. The control arm received the standard weight-based 3-day course. ECGs were performed at day 0 and 4–5 hours after the last dose at day 5. QT intervals were read manually using the tangent method and automatically. Bazett’s (QTcB) and Fridericia’s (QTcF) formulae were used for correction for heart rate. Descriptive statistics were used to calculate baseline characteristics and the number of supra-thresholds QTc intervals (QTc prolongation >500, change in QTc interval (DQTc) >60 ms). The mean change in QTc interval in and between the two arms was compared using the paired t-test and independent samples t-test, respectively. Results: A total of 195 patients were enrolled, 103 and 92 in the intervention and control arm, respectively. No patient experienced QTc intervals >500 ms on day 5 by both formulae. Patients with DQTc >60 ms, for QTcF were 6/103 (5.8%) vs 2/92 (2.2%) in the intervention and control arms, respectively. For QTcB was 2/103 (1.9%) vs 1/92 (1.1%) in the intervention and control arms, respectively. The mean difference in DQTc interval was statistically significant between the two arms with both correction formulae, 11.4 ms 50 (p= 0.010) and 13.4 ms (p= 0.001), for QTcB and QTcF respectively. Conclusion: The extended 6-day course of artemether-lumefantrine did not reveal clinically relevant QTc prolonging effects. However, significant QTcF prolongation and presence of patients with supra-threshold QTc values observed in the intervention arm underscore the importance of further monitoring of QTc parameters in extended artemether-lumefantrine treatment.
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