Patent ID: 8888766

Claim:
A method of treating tissue to create a bi-atrial treatment pattern on a first and a second tissue Where the first tissue and the second tissue are located on opposite sides of a cardiac tissue, the method comprising: positioning a first treatment device adjacent to the first tissue; creating a first partial treatment pattern on the first tissue with the first treatment device, wherein the first partial treatment pattern comprises at least a first plurality of areas of non-viable injury in the first tissue, wherein at least two of the areas of non-viable injury are separated by a gap that allows an electrical impulse to flow therethrough in the cardiac tissue: determining a position on the second tissue for a second treatment device; positioning the second treatment device at the position on the second tissue, wherein the second tissue is located on opposite sides of the first tissue; and creating a second partial treatment pattern on the second tissue with the second treatment device, wherein the second partial treatment pattern comprises at least one area of injury in the second tissue across the gap to form a complete treatment pattern such that the electrical impulse cannot flow across the complete treatment pattern.