Image-based electrode array tracking for epicardial electrophysiological mapping in minimally invasive arrhythmia...

Area of Science:

• Medical technology
• Surgical innovation
• Electrophysiology

Background:

• Minimally invasive arrhythmia surgery relies on precise electrophysiological mapping.
• Existing epicardial mapping systems often use complex optical tracking requiring line-of-sight and intricate setup.

Purpose of the Study:

• To propose and validate a new image-based tracking method for locating electrode arrays in minimally invasive arrhythmia surgery.
• To simplify the tracking system for epicardial electrophysiological mapping.

Main Methods:

• Development of a small electrode array with optical markers.
• Tracking of marker and array positions/orientations via endoscopic video stream.
• Calculation of array orientation using vector dot products.

Main Results:

• Achieved mean tracking errors of 0.51 mm for position and 0.64° for orientation.
• Demonstrated a constant processing time of 46 ms per frame.
• Successfully reconstructed a global epicardial electrophysiological map in vivo.

Conclusions:

• The proposed image-based tracking method is accurate, fast, and suitable for surgical environments.
• This method simplifies electrode array tracking systems, eliminating the need for separate tracking hardware.
• Enables more accessible and efficient minimally invasive arrhythmia surgery.