Pre-excitation index is a useful measurement to confirm the presence of an accessory pathway mediated tachycardia and identify the side of the accessory pathway

This is a very elegant technique to detect the presence of an accessory pathway during narrow complex tachycardia.

Differential pacing is another maneuver complementary to parahisian pacing which we can apply in sinus rhythm to look for accessory AV connections (accessory pathways)

Parahisian pacing is a maneuver which we can apply in sinus rhythm to look for accessory AV connections (accessory pathways)