Variant preexcitation syndrome: a true nodoventricular mahaim fiber or an accessory atrioventricular pathway with decremental properties?
The finding that the S-Delta interval could become shorter than the A2HB-Delta interval provides strong evidence that this accessory pathway was not connected to the AV node but arose directly from the atrial tissue of the posteroseptal region.
Our strategy of profiling contractile markers distinguished mouse aqueous drainage tract structures that were otherwise indistinguishable by hematoxylin and eosin staining. The mouse TM was seen as an intervening structure between SC, a part of the conventional drainage tract, and CM, a part of the unconventional drainage tract. Our findings provide important insights into the structural and functional organization of the mouse aqueous drainage tract and a basis for exploring the role of contractility in modulating aqueous outflow.