Why the study?
Recent data suggest systemic inflammation negatively affects atrioventricular conduction independently of acute cardiac injury, but the acute impact and underlying mechanisms remained to be evaluated.
Does systemic inflammation and IL-6 acutely delay atrioventricular conduction via connexin43 down-regulation?
Population
Patients with inflammatory diseases of different origins, guinea pig models, and cultured cells
Comparison
Active inflammatory phase vs recovery, and direct IL-6 administration vs control conditions
Design
Translational study combining clinical, in vivo animal, and in vitro cellular analyses
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May link acute inflammation to AV delay via IL-6; hypothesis-generating for clinical AV block risk, requiring human studies.
Does systemic inflammation and IL-6 acutely delay atrioventricular conduction via connexin43 down-regulation?
Systemic inflammation, mediated by IL-6, acutely delays atrioventricular conduction by down-regulating cardiac connexin43, potentially increasing the risk of AV block during active inflammation.
A 2021 study studied this question.
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