Initial Clinical Experience With a Novel 8-Spline High-Resolution Mapping Catheter

Area of Science:

• Cardiac Electrophysiology
• Medical Device Technology
• Catheter Ablation

Background:

• The Octaray is a new multispline mapping catheter featuring 48 microelectrodes for high-resolution electroanatomical mapping.
• This technology aims to enhance the precision and efficiency of mapping cardiac arrhythmias.

Purpose of the Study:

• To evaluate the initial clinical experience with the Octaray catheter in various cardiac arrhythmias.
• To compare the mapping performance of the Octaray catheter against the 5-spline Pentaray catheter.

Main Methods:

• Retrospective analysis of 50 consecutive procedures in 46 patients.
• Assessment of safety, efficacy, and acute procedural success.
• Comparative analysis of mapping data (electrograms per map, mapping time, point density, acquisition rate) in 10 patients with sustained atrial tachycardia.

Main Results:

• Left atrial and ventricular mapping was safely performed using transseptal or retroaortic access with the Octaray catheter.
• The acute procedural success rate was 94%.
• In sustained atrial tachycardia, the Octaray catheter showed significantly higher electrogram counts, point density, and acquisition rate in a shorter time compared to the 5-spline catheter.

Conclusions:

• Initial experience indicates that the Octaray catheter is safe and efficient for high-resolution electroanatomical mapping.
• The Octaray catheter demonstrated superior mapping speed and data density compared to the 5-spline catheter in sustained atrial tachycardia.
• Further validation in larger, multicenter studies with longer follow-up is recommended.