Method and Apparatus To Synchronize a Location Determination in a Structure With a Characteristic of the Structure

A method of synchronizing a position determination within a volume of a patient and a physiological cycle of the patient, comprising:

• determining at least a first portion and a second portion of a physiological cycle of the patient;
• positioning an instrument in the patient;
• collecting a first plurality of map data with the instrument in the patient during the first portion of the determined physiological cycle;
• collecting a second plurality of map data with the instrument in the patient during the second portion of the determined physiological cycle;
• and
• displaying at least one of the first plurality of map data and the second plurality of map data on a display device.

A system to synchronize a position determination within a volume of a patient and a physiological cycle of the patient, comprising:

• a position sensing unit, including:
• a set of axis electrodes positioned on the patient;
• a driver to inject a current into the patient between the set of axis electrodes;
• a mapping instrument positionable in the patient having a position element to sense an electrical property based on the injected current;
• and
• a processor operable to determine a position of the position element based on the sensed electrical property;
• a physiological synchronizing system having a physiological sensing portion operable to determine at least a first portion and a second portion of a physiological cycle of the patient;
• and
• a display device to display map data;
• wherein the processor is operable to classify the determined positions of the position element as within the first portion or the second portion of the physiological cycle and display the classified map data.