Patent
Circumferential ablation device assembly
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TLDR
In this article, a circumferential ablation device assembly is presented which is adapted to forming a conduction block in a pulmonary vein, which circumscribes the pulmonary vein lumen and transects the electrical conductivity of the vein against conduction along its longitudinal axis.Abstract:
This invention is a circumferential ablation device assembly which is adapted to forming a circumferential conduction block in a pulmonary vein. The assembly includes a circumferential ablation element which is adapted to ablate a circumferential region of tissue along a pulmonary vein wall which circumscribes the pulmonary vein lumen, thereby transecting the electrical conductivity of the pulmonary vein against conduction along its longitudinal axis and into the left atrium. The circumferential ablation element includes an expandable member with a working length that is adjustable from a radially collapsed position to a radially expanded position. An equatorial band circumscribes the outer surface of the working length and is adapted to ablate tissue adjacent thereto when actuated by an ablation actuator. The equatorial band has a length relative to the longitudinal axis of the expandable member that is narrow relative to the working length, and is also substantially shorter than its circumference when the working length is in the radially expanded position. A pattern of insulators may be included over an ablation element which otherwise spans the working length in order to form the equatorial band described. The expandable member is also adapted to conform to the pulmonary vein in the region of its ostium, such as by providing a great deal of radial compliance or by providing a taper along the working length which has a distally reducing outer diameter. A linear ablation element is provided adjacent to the circumferential ablation element in a combination assembly which is adapted for use in a less-invasive “maze”-type procedure in the region of the pulmonary vein ostia in the left ventricle.read more
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References
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TL;DR: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall of the probe, which can be used to direct a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue as discussed by the authors.
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Catheters for imaging, sensing electrical potentials and ablating tissue
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The surgical treatment of atrial fibrillation: III. Development of a definitive surgical procedure
James L. Cox,Richard B. Schuessler,Harry J. D'Agostino,Constance M. Stone,Byung Chul Chang,Michael E. Cain,Peter B. Corr,John P. Boineau +7 more
TL;DR: Since September 1987, this surgical procedure has been applied in seven patients and all seven patients have been cured of atrial fibrillation and none is receiving any postoperative antiarrhythmic medications.
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A Focal Source of Atrial Fibrillation Treated by Discrete Radiofrequency Ablation
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