Key result
Reentrant atrial tachycardia with complex boundaries manifests as dual simultaneous loops rotating around critical obstacles.
Why the study?
Recent translational studies have shown that reentrant atrial tachycardia in humans is driven by rotation around two critical boundaries, but the role of multiple boundaries in complex reentry remains to be elucidated.
Case Report
Answers are grounded in this paper and cite their sources.
Describes a unique topological finding of double figure-of-eight reentry using four critical boundaries in atrial tachycardia.
Recent translational studies by Vandersickel and Duytschaever et al. focusing on topology and the role of critical (CBs) and non-critical boundaries (NCBs) in reentry, have shown that reentrant atrial tachycardia (AT) in humans is driven by rotation around two CBs. 1-3 In atria with two boundaries-only, this manifests as a single reentrant loop with clockwise (CW) rotation around one CB and counterclockwise (CCW) rotation around the other CB. In atria with three boundaries or more, paired CB rotation manifests itself as two loops simultaneously rotating (one CW, the other CCW) around both CBs with parallel activation around the residual NCBs.
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Duytschaever et al. (2026) conducted a case report in Atrial Tachycardia. Reentrant atrial tachycardia with three or more boundaries manifests as two loops simultaneously rotating around paired critical boundaries with parallel activation around residual boundaries.
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