Electrophysiological device for the isthmus
First Claim
1. An electrophysiology device for ablating the isthmus region of the heart adjacent to the tricuspid valve, the device comprising:
- an elongate shaft having a predetermined operable configuration including a proximal portion extending in an axial direction and an operable distal portion extending transverse to the axial direction;
a hook end region of the shaft distal portion generally extending toward or along the axial direction of the proximal portion of the elongate shaft in spaced relation thereto for anchoring to the tricuspid valve of the heart;
an interface region of the shaft distal portion extending between the proximal portion and the hook end region; and
a reverse curved portion of the interface region that bows the distal portion back inwardly for providing intimate contact with the isthmus region with retraction of the shaft distal portion and engagement of the hook end region with the tricuspid valve for an ablation operation on the isthmus region wherein the operable distal portion includes an arcuate region between the proximal region and the interface region with both the arcuate region and hook end region bowing outwardly opposite to the inward bowing of the interface region.
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Accused Products
Abstract
An intravascular electrophysiology (EP) device for the mapping and/or formation of lesions along the isthmus region of a heart that has particular utility in the treatment of atrial flutter. The EP device of the invention has an elongated shaft with a proximal section, a compound-curved or modified pigtail-shaped distal section, and a plurality of at least partially exposed electrodes disposed on an outer surface of the distal section. The electrodes are spaced along a length of the distal section and may be interspersed with at least one temperature sensor located between electrodes. The shape of the distal end of the device enables manipulation of the device by inserting its distal end in the tricuspid valve and retracting the device to bias the section having electrodes along the isthmus to achieve acceptable contact with the region so high frequency (e.g., RF) electrical energy delivered to the electrodes on the distal section of the EP device will form a lesion. Sections of the isthmus where treatment is desired but not reached by the section of the device biased against tissue by retraction may be ablated by repeating the steps of hooking the tricuspid valve at a different end location of the device and retracting to bias the electrodes against different tissue, simply advancing the section with electrodes to the desired site or retracting the device so a tip connected to an RF source will drop into a desired site where ablation may occur.
97 Citations
8 Claims
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1. An electrophysiology device for ablating the isthmus region of the heart adjacent to the tricuspid valve, the device comprising:
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an elongate shaft having a predetermined operable configuration including a proximal portion extending in an axial direction and an operable distal portion extending transverse to the axial direction;
a hook end region of the shaft distal portion generally extending toward or along the axial direction of the proximal portion of the elongate shaft in spaced relation thereto for anchoring to the tricuspid valve of the heart;
an interface region of the shaft distal portion extending between the proximal portion and the hook end region; and
a reverse curved portion of the interface region that bows the distal portion back inwardly for providing intimate contact with the isthmus region with retraction of the shaft distal portion and engagement of the hook end region with the tricuspid valve for an ablation operation on the isthmus region wherein the operable distal portion includes an arcuate region between the proximal region and the interface region with both the arcuate region and hook end region bowing outwardly opposite to the inward bowing of the interface region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification