In the typical form--constituting 90% of cases (15)--antegrade conduction is via the slow pathway
and retrograde conduction is via the fast pathway.
CAG and EPS showed normal epicardial coronary arteries and atrioventricular node reentry (AVNRT), respectively; and slow pathway
ablation was performed successfully.
This pattern suggests antegrade conduction down the fast pathway and retrograde conduction up the slow pathway
in someone with dual A-V nodal pathways.
Kaleagzi, "Recovery of absence seizure-like symptoms in a patient after slow pathway
radiofrequency ablation," International Journal of Cardiology, vol.
A 24-hour ambulatory ECG recorded during the same admission also showed a striking transient increase in the P-R interval following a couplet of ventricular premature complexes (Figure 2), again suggesting the presence of dual A-V nodal pathways with the fast pathway having a longer refractory period than the slow pathway
, as is usually the case.
Which parameters describe the electrophysiological properties of successful slow pathway
RF ablation in patients with common atrioventricular nodal reentrant tachycardia?
It may conduct down the slow pathway
, which has a shorter refractory period, and reach the ventricles with a long P-R interval.
Cryothermal ablation of the slow pathway
for the elimination of atrioventricular nodal reentrant tachycardia.
Predictors of Acute and Long Term Success of Slow Pathway
Ablation for Atrioventricular Nodal Reentrant Tachycardia: A Single Center Series of 1,419 Consecutive Patients.
Later on, the patient underwent successful and uncomplicated slow pathway
modification for the treatment of typical slow-fast AVNRT.
Patients with AVNRT have two discrete functionally distinct pathways known as the slow pathway
(slow conduction and short refractory period) and the fast pathway (fast conduction but prolonged refractory period) [3, 4].
Ablation of SVT targets specific electro-anatomical substrates which include the slow pathway
in Atrioventricular Nodal Reentry Tachycardia (AVNRT), the accessory pathway in Atrioventricular Reentrant Tachycardia (AVRT) or an ectopic focus in Atrial Tachycardia (AT)3-6.