Key result
Deletion of choline acetyltransferase from noradrenergic neurons increased action potential duration dispersion after myocardial infarction compared to wild-type mice (11.9 vs. 8.2 ms; P<0.05).
Why the study?
Cardiac sympathetic nerves undergo cholinergic transdifferentiation after reperfused MI, but the functional electrophysiological consequences have never been explored.
Population
WT mice and choline acetyltransferase KO mice undergoing MI or sham surgery
Comparison
KO MI vs WT MI
Design
Ex vivo animal experimental study with optical mapping
Authors
Loading...
May reduce post-MI arrhythmogenic substrate via sympathetic cholinergic transdifferentiation in mice; leaves open translation to human arrhythmia risk.
Absolute Event Rate: 11.9% vs 8.2%
p-value: p=<0.05
Cholinergic transdifferentiation of cardiac sympathetic neurons following myocardial infarction reduces action potential duration dispersion, suggesting a potential endogenous antiarrhythmic mechanism.
Wang et al. (2020) studied Myocardial infarction (n=14). Deletion of choline acetyltransferase from adult noradrenergic neurons vs. Wild-type mice was evaluated on Action potential duration dispersion (p=<0.05). Deletion of choline acetyltransferase from noradrenergic neurons increased action potential duration dispersion after myocardial infarction compared to wild-type mice (11.9 vs. 8.2 ms; P<0.05).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: