Expandable electrode for coronary venous leads

United States Patent [w]

Tockman et al.

US006136021A [ii] Patent Number: [45] Date of Patent:

6,136,021 Oct. 24,2000

[54] EXPANDABLE ELECTRODE FOR CORONARY VENOUS LEADS

[75] Inventors: Bruce A. Tockman, Scandia; Randy W. Westlund, Minneapolis; Stuart R. Chastain, Shoreview; Lili Liu, White Bear Lake, all of Minn.

[73] Assignee: Cardiac Pacemakers, Inc., St. Paul, Minn.

[21] Appl. No.: 09/274,621 [22] Filed: Mar. 23, 1999

[51] Int. C I. A61N 1/05

[52] U.S. CI 607/122; 607/119; 607/12.5;

600/381

[58] Field of Search 600/374, 375,

600/381; 607/122, 125, 126, 119

[56] References Cited

U.S. PATENT DOCUMENTS

4,424,305 1/1984 Gould et al. .
4,434,797 3/1984 Silander .
4,785,059 11/1988 Fydelor et al. .