Atrial fibrillation treatment systems and methods

A method of treating cardiac complex rhythm disorder in a patient, the method comprising:

• receiving a plurality of electrical signals from a sensor system, wherein each electrical signal corresponds with a separate location on a cardiac wall of the heart of the patient, wherein each electrical signal comprises an electrogram waveform, and wherein at least some of the plurality of electrical signals comprise first wavefronts that are distinguishable from a base signal of the heart;
• ranking the plurality of electrical signals relative to each other by:
• determining that at least some of the electrogram waveforms show propagation of the first wavefronts;
• assigning a higher ranking to an electrical signal in which the first wavefronts are present at an earlier time, as compared with a ranking of an electrical signal in which the first wavefronts are present at a later time;
• and
• if an electrical signal has an electrogram waveform that has a stable frequency that is higher than a stable frequency of another electrogram waveform of another electrical signal, assigning a higher ranking to the electrical signal that is associated with the higher frequency as compared with a ranking of the electrical signal that is associated with the lower frequency;
• and
• identifying a target site of the cardiac wall for ablation based on the ranking of the electrical signals.

A method of treating cardiac complex rhythm disorder in a patient, the method comprising:

• receiving a plurality of electrical signals from a sensor system that senses a region of a cardiac wall of the patient, wherein each electrical signal corresponds with a separate location within the region of the cardiac wall of the patient, and wherein each electrical signal comprises an electrogram waveform;
• determining that the electrogram waveforms include electrical wavefronts that are distinguishable from a base signal of the heart and that the electrogram waveforms show propagation of the electrical wavefronts away from at least a portion of the region of the cardiac wall;
• ranking the separate locations on the cardiac wall as to their likelihood of being the site of an atrial driver by comparing the electrogram waveforms based on the timing at which the electrical wavefronts are present;
• and
• determining that the electrical wavefronts occur at a stable frequency.

A method of treating cardiac complex rhythm disorder in a patient, the method comprising:

• receiving an electrical signal from a sensor system, wherein the electrical signal corresponds with a location on a cardiac wall of the heart of the patient, and wherein the electrical signal comprises an electrogram waveform;
• determining whether the electrogram waveform shows intermittent suppression of a stable frequency;
• determining whether the electrogram waveform returns to the stable frequency after the suppression;
• and
• identifying the location on the cardiac wall as a target for focal ablation.