Key result
Torsadogenic hERG blocking drugs (13 of 15 tested) induced parasympathetic activation or sympatho-vagal coactivation and enhanced HFQT oscillations via reflex compensatory mechanisms in beagle dogs.
Why the study?
HERG blocking drugs can trigger Torsades de Pointes and induce autonomic and QT oscillations, but the underlying mechanism leading to these autonomic changes remained uncharacterized.
Population
Beagle dogs
Comparison
15 torsadogenic hERG blocking drugs
Design
Preclinical telemetric study
Authors
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May implicate autonomic reflexes in torsades risk with hERG blockers; hypothesis-generating in dogs and requires human validation.
Hemodynamic side effects of torsadogenic hERG blocking drugs contribute to ventricular arrhythmias by triggering autonomic reflexes and enhancing HFQT oscillations.
Champéroux et al. (2022) studied Ventricular arrhythmias. Torsadogenic hERG blocking drugs was evaluated on Autonomic control changes and haemodynamic effects. Torsadogenic hERG blocking drugs (13 of 15 tested) induced parasympathetic activation or sympatho-vagal coactivation and enhanced HFQT oscillations via reflex compensatory mechanisms in beagle dogs.
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