Automatic termination of radiofrequency energy upon catheter dislocation

Area of Science:

• Cardiology
• Biomedical Engineering

Background:

• Radiofrequency (RF) catheter ablation is a standard treatment for cardiac arrhythmias since 1987.
• Catheter dislocation during RF delivery can lead to unintended heating of healthy cardiac tissue, posing a safety risk.

Purpose of the Study:

• To develop and evaluate a novel device designed to enhance safety during RF catheter ablation procedures.
• The device aims to prevent unintentional tissue damage by monitoring catheter position.

Main Methods:

• A microprocessor-based device was developed, connecting between the RF generator's indifferent cable and the patient's back electrode.
• It utilizes a 3D electrode visualization system (LocaLisa) to continuously monitor electrode position.
• The system triggers an automatic interruption of RF energy delivery upon detecting sudden changes in electrode position.

Main Results:

• The device demonstrated immediate termination of RF energy delivery at various sensitivity settings.
• Testing showed effective detection and termination at electrode dragging speeds of 1 cm/sec (sensitivity 10) up to 10 cm/sec (sensitivity 100).
• The system successfully prevented RF delivery when electrode dislocation occurred.

Conclusions:

• The developed device significantly improves safety during cardiac arrhythmia ablation.
• It offers a reliable method for real-time monitoring and automatic interruption of RF energy, reducing the risk of complications.