Method for analysing an intracardiac electrogram

A method for analysing an intracardiac electrogram for detecting a pulmonary vein isolation status, wherein:

• the intracardiac electrogram has been recorded at a target region via a catheter inserted into a human body;
• the catheter comprises multiple electrodes;
• multiple channels of the intracardiac electrogram have been recorded by the multiple electrodes;
• the multiple electrodes have a fixed order of placement;
• in an analysis routine, a control system determines an electrical status of the target region by analysing at least three of the multiple channels,
• the order of the multiple electrodes is provided to the control system or saved in a memory of the control system;
• in the analysis routine, the control system determines the electrical status of the target region based on relative spatial information including the order of placement of the multiple electrodes;
• in the analysis routine, the control system identifies activation candidates in at least three of the multiple channels;
• in the analysis routine the control system performs a classification routine for at least some of the activation candidates by classifying the activation candidates into groups, the groups comprising at least one group assigned to local activations and/or at least one group assigned to far field interference;
• and
• in the classification routine the control system identifies a timing sequence and/or a timing difference between at least two activation candidates of different of the multiple channels based on the spatial information to differentiate between local activations and far field interference.