Venous catheter based mapping of epicardial ectopic activation

Area of Science:

• Cardiovascular Electrophysiology
• Medical Imaging and Signal Processing

Background:

• Epicardial electrophysiological studies are often limited by accessibility.
• Current methods for epicardial mapping face challenges with spatial resolution and invasiveness.

Purpose of the Study:

• To develop and evaluate a statistical approach for high-resolution epicardial activation mapping.
• To assess the impact of training data composition and electrode selection on mapping accuracy.

Main Methods:

• Utilized a statistical method to estimate high-resolution epicardial activation maps from low-resolution venous catheter measurements.
• Investigated the influence of training dataset characteristics and catheter electrode placement.
• Compared two distinct leadset selection strategies.

Main Results:

• Accurate prediction of earliest activation sites correlated with the similarity between training data features and reconstructed maps.
• Similar accuracy levels were achieved using two different leadset selection approaches.
• Demonstrated the feasibility of reconstructing complete epicardial activation maps.

Conclusions:

• The developed statistical approach enables accurate epicardial activation mapping from venous catheter data.
• The method is practical for clinical application, overcoming limitations of current techniques.
• High-resolution epicardial mapping is achievable non-invasively.