Why the study?
Diabetic patients have prolonged cardiac repolarization and higher arrhythmia risk, and diabetes activates innate immunity to raise plasmatic cytokines that can prolong ventricular repolarization.
Do circulating inflammatory factors (TNFα and IL-1b) contribute to impaired ventricular repolarization and arrhythmia susceptibility in a rat model of type 2 diabetes?
Population
Sprague-Dawley rats fed high-fat diet with streptozotocin injection and isolated ventricular myocytes
Comparison
Metabolic model of type 2 diabetes vs control conditions
Design
Preclinical animal and cellular experimental study
Follow-up
6 weeks
Authors
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Implicates TNFα/IL-1b in T2D-related QT prolongation and arrhythmias; hypothesis-generating and should not yet change practice.
Do circulating inflammatory factors (TNFα and IL-1b) contribute to impaired ventricular repolarization and arrhythmia susceptibility in a rat model of type 2 diabetes?
Elevated circulating levels of TNFα and IL-1b in a type 2 diabetes rat model are responsible for impaired ventricular repolarization and increased susceptibility to cardiac arrhythmias.
Zayas-Arrabal et al. (2021) studied this question.
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