Which type of WPW pathway travels from the ventricles to the atria?

The type of Wolf-Parkinson-White (WPW) pathway that travels from the ventricles to the atria is referred to as antidromic. In antidromic conduction, the electrical impulse moves backward through the accessory pathway, which connects the ventricles to the atria, leading to activation of the atria after the ventricles. This type of conduction can create a characteristic pattern on the electrocardiogram (ECG), often associated with specific tachyarrhythmias.

In available scenarios, orthodromic pathways, which travel from the atria to the ventricles, utilize the normal conduction system and the accessory pathway for reentrant circuits, typically resulting in a narrow QRS complex on the ECG. Concurrent pathways are not standard terminology in WPW discussions, and reentrant circuits are general mechanisms of tachycardia involving pathways traveling in both directions but do not specify the directionality from ventricles to atria. The context of each choice clarifies why the antidromic type is distinctive as it describes the specific pathway directionality in WPW scenarios.