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Perioperative mapping of parahisian accessory pathways
T W Verbeet1, G Van-Nooten, J J Massaut
1Cardiology Department, University Hospital Brugmann, Brussels, Belgium.
Pacing and Clinical Electrophysiology : PACE
|December 1, 1990
Summary
Deep septal "parahisian" bypass tracts were identified using epicardial mapping, intra-atrial activation mapping, and cryomapping. These techniques help confirm diagnosis of these challenging accessory pathways.
Area of Science:
- Electrophysiology
- Cardiac Surgery
- Medical Imaging
Background:
- Deep septal "parahisian" bypass tracts present diagnostic challenges due to their location.
- Accurate localization is crucial for successful surgical ablation.
Observation:
- Epicardial activation mapping revealed distinct patterns for "parahisian" pathways compared to free-wall pathways.
- Right intra-atrial activation mapping and cryomapping provided precise localization of these pathways.
Findings:
- Case 1: A concealed anteroseptal bypass tract was identified using a combination of mapping techniques.
- Case 2: A right posterior "parahisian" bypass tract was confirmed with intra-atrial mapping and cryomapping.
Implications:
- Specific epicardial mapping patterns can suggest the presence of deep septal bypass tracts.
- Intra-atrial activation and cryomapping are valuable for confirming diagnoses of "parahisian" pathways.