الفهرس 
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Abstract
The aim of the work is to determine the criteria of successful ablation site of atrioventricular nodal reentrant tachycardia (AVNRT) using the anatomical electrogram.
Conclusion:
1- Treatment of atrioventricular nodal reentrant tachycardia by slow pathway ablation is effective, safe and implies very slow incidence of complications.
2- Anatomical electrogram guided approach is accompanied with nearly 100% success rate of ablation.
3- Mid septal site is the preferable site to start slow pathway ablation if we could record a/v ratio ≤ 0.35 and a multicomponent a wave.
4- Immediate rate of AV block is 3.3%, none of which need permanent pacing.
5- Presence of junctional rhythm during ablation, a/v ratio ≤ 0.35 and/ or multicomponent a wave at the ablation catheter predict success of the ablation.
Recommendations:
1- Ablation at the mid septal site using the anatomical electrogram guided approach with a/v ratio ≤ 0.35 and/ or multicomponent a wave is likely to increase the probability of successful ablation area per patient and reducing immediate and long term development of AV block.
2- Further studies are required to compare the results of ablation of slow pathway depending on slow pathway potential approach versus ablation or anatomical land marks, and also comparing both techniques versus the combined technique we are proposing.