05423807 is referenced by 405 patents and cites 33 patents.

The invention provides a catheter for ice mapping and ablation and a method of ablation using the catheter. The catheter includes at least two conduits for circulating a refrigerating fluid adjacent an ablation device located at the end of a catheter. The refrigerated ablation device is used to chill a localized region of myocardial tissue, thereby permitting the resulting change in electrical activity to be determined. In response to the test results, the ablation device may be used to make a lesion in the myocardial tissue to correct a cardiac arrhythmia. In one embodiment, the ablation device is an electrode which uses radio frequency energy to ablate the myocardial tissue. Alternatively, the ablation device is an electrode adapted for direct current ablation. In another embodiment, the electrode is replaced with an optical fiber in communication with a laser which uses the laser's light energy to ablate tissue. Yet another embodiment is a cryogenic catheter having combined or separate mapping and ablation devices. In another embodiment, a cryogenic catheter is provided having an inner conduit with a stepped down diameter. The embodiments may include provisions for steering the catheter and for stabilizing the ablation device at the proposed lesion site.

Title
Cryogenic mapping and ablation catheter
Application Number
870495
Publication Number
5423807
Application Date
January 24, 1994
Publication Date
June 13, 1995
Inventor
Fredric L Milder
Brookline
MA, US
Agent
Weingarten Schurgin Gagnebin & Hayes
Assignee
Implemed
MA, US
IPC
A61B 17/36
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