Surgery – Instruments – Electrical application
Reexamination Certificate
2001-05-29
2008-08-19
Peffley, Michael (Department: 3739)
Surgery
Instruments
Electrical application
C607S122000
Reexamination Certificate
active
07413568
ABSTRACT:
A method of ablating tissue in the heart to treat atrial fibrillation introduces into a selected atrium an energy emitting element. The method exposes the element to a region of the atrial wall and applies ablating energy to the element to thermally destroy tissue. The method forms a convoluted lesion pattern comprising elongated straight lesions and elongated curvilinear lesions. The lesion pattern directs electrical impulses within the atrial myocardium along a path that activates the atrial myocardium while interrupting reentry circuits that, if not interrupted, would cause fibrillation. The method emulates the surgical maze procedure, but lends itself to catheter-based procedures that do not require open heart surgical techniques. A composite structure for performing the method is formed using a template that displays in planar view a desired lesion pattern for the tissue. An array of spaced apart element is laid on the template. Guided by the template, energy emitting and non-energy emitting zones are formed on the elements. By overlaying the elements, the composite structure is formed, which can be introduced into the body to ablate tissue using catheter-based, vascular access techniques.
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“Electroth
Fleischman Sidney D.
Kordis Thomas F.
McGee David L.
Swanson David K.
EP Technologies, Inc.
Henricks Slavin & Holmes LLP
Peffley Michael
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