Focal point identification and mapping

A system comprising:

• memory to store data and machine readable instructions;
• and
• a processor to access the memory and execute the machine readable instructions, the machine readable instructions comprising:
• a phase calculator programmed to compute phase values for electrical signals at a plurality of nodes distributed across a geometric surface corresponding to patient tissue;
• a focal detector programmed to determine whether or not a given candidate node of the plurality of nodes is a focal point based on analyzing the computed phase value of the given candidate node relative to the phase value of each node in a set of nodes neighboring and surrounding the given node for an activation time interval associated with the given candidate node, wherein the focal detector is programmed to repeat the analyzing and determining for each candidate node of at least a substantial portion of the plurality of nodes to store focal point data in the memory;
• and
• a map generator programmed to generate a display of a graphical map representing at least one of the focal points detected on the geometric surface based on the focal point data.

A method comprising:

• storing, in memory, electrical data representing electrical signals for a geometric surface corresponding to patient tissue;
• computing, by a processor, phase values for the electrical signals at a plurality of nodes distributed across the geometric surface based on the electrical data;
• determining, by a processor, whether or not a given candidate node of the plurality of nodes is a focal point based on analyzing the computed phase value of the given candidate node relative to the phase value of each node in a set of nodes neighboring and surrounding the given node for an activation time interval associated with the given candidate node, focal point data being stored in the memory based on the determination;
• and
• repeating the computing and the determining for each candidate node of at least a substantial portion of the plurality of nodes to provide the focal point data specifying a spatial location corresponding to each detected focal point on the geometric surface;
• providing a graphical map to a display to visualize at least one of the focal points detected on the geometric surface based on the focal point data.