Why the study?
Does the hyperpolarization-activated inward current (If) affect action potential propagation and ectopic activity in normal and pathological cardiac tissue models?
Population
Computer simulation model of normal and pathological cardiac tissue
Comparison
Presence or overexpression of… vs Absence or normal expression of If
Design
Preclinical
Authors
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May increase conduction velocity yet promote ectopy with reduced coupling; hypothesis-generating for If modulation, requires in vivo validation.
Does the hyperpolarization-activated inward current (If) affect action potential propagation and ectopic activity in normal and pathological cardiac tissue models?
Computer simulations suggest that increased If current may prevent conduction slowing but its overexpression can lead to ectopic activity, particularly when cellular coupling is reduced by fibrosis.
Kuijpers et al. (2006) studied this question.
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