Open Window Mapping of Accessory Pathways: A Literature Review and Practical Guide
Rajdip Dulai1, Fatima Bangash2,3, Ajay Sharma2
1Cardiology Research Department, Eastbourne District General Hospital, East Sussex Hospitals NHS Trust Eastbourne, UK.
Insights
Open window mapping (OWM) is a novel technique for locating and ablating accessory pathways (APs) that cause dangerous heart rhythms. This method offers significant advantages over traditional electrogram assessment for catheter ablation procedures.
Area of Science:
- Electrophysiology
- Cardiovascular Medicine
- Medical Technology
Background:
- Symptomatic accessory pathways (APs) necessitate catheter ablation, especially when causing atrioventricular reciprocating tachycardia or posing sudden cardiac death risk.
- Conventional mapping of APs involves time-consuming point-by-point electrogram analysis, which can be challenging.
- Novel techniques are needed to improve the efficiency and accuracy of AP localization and ablation.
Purpose of the Study:
- To review the existing literature on open window mapping (OWM) for accessory pathway ablation.
- To highlight the technical aspects and mapping considerations pertinent to the OWM technique.
- To present specific clinical cases illustrating the utility of OWM.
Main Methods:
- Literature review of studies investigating open window mapping (OWM).
- Analysis of technical requirements and mapping strategies for OWM.
- Case study compilation demonstrating OWM application in accessory pathway ablation.
Main Results:
- Open window mapping (OWM) using 3D navigational systems is an emerging technique for accessory pathway (AP) localization.
- OWM demonstrates significant advantages compared to conventional point-by-point mapping methods.
- The review synthesizes current knowledge on OWM's technical aspects and clinical utility.
Conclusions:
- Open window mapping (OWM) represents a promising advancement in catheter ablation for accessory pathways (APs).
- OWM offers a potentially more efficient and effective approach to mapping and ablating APs.
- Further research and clinical adoption of OWM are warranted to solidify its role in managing AP-related arrhythmias.
Abstract:
Catheter ablation is the treatment of choice for patients with symptomatic accessory pathways (APs) causing recurrent atrioventricular reciprocating tachycardia or in situations where APs conduct rapidly, posing a risk of sudden cardiac death. Conventional AP mapping relies on point-by-point assessment of local electrograms looking closely for pathway electrograms or early atrial or ventricular electrograms, which may be challenging and time consuming. Recently, open window mapping (OWM) using 3D navigational systems has emerged as a novel technique to help localise and ablate APs. OWM has significant advantages over conventional point-by-point mapping techniques. The purpose of this review is to summarise the currently available literature on the OWM technique and to highlight the technical aspects and mapping considerations for OWM, including specific cases demonstrating its utility.
