Key result
Gross dissection of 18 autopsied hearts revealed marked variability in the superficial atrial muscle fibers in the triangle of Koch, with AVNRT ablation lesions located within these fibers rather than the discrete AV node.
Observational (n=18)
The variability in superficial atrial muscle fibers in the triangle of Koch may influence AV node impulse routing, and AVNRT ablation targets these fibers rather than the discrete AV node.
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Suggests refining AVNRT ablation to target variable superficial fibers; leaves open clinical outcome impact.
Sánchez‐Quintana et al. (1997) conducted an observational in Normal hearts and AV nodal reentrant tachycardia (AVNRT) (n=18). Anatomical and histological examination was evaluated on Architecture of the superficial atrial musculature in the region of the triangle of Koch. Gross dissection of 18 autopsied hearts revealed marked variability in the superficial atrial muscle fibers in the triangle of Koch, with AVNRT ablation lesions located within these fibers rather than the discrete AV node.
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