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Proceedings Paper

Successful Nd:Yag Laser Photocoagulation Of Arrhythmogenic Myocardium: Potential Limitations Of Current Optical Delivery Systems.
Author(s): Robert H. Svenson; Marie-Claire Marroum; Frank Frank; Jay G. Selle; John J. Gallagher; George Bou-Saba; Kathleen T. Seifert; Kathy Linder; George P. Tatsis
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Paper Abstract

Canine myocardial lesions of predictable dimensions can be achieved with Nd:YAG laser photocoagulation. These lesions are well demarcated from surrounding normal tissue and heal with homogeneous scar formation. Intraoperative Nd:YAG laser photocoagulation successfully ablated 52 of 55 ventricular tachycardias in 17 patients. Histologic examination of tissues from these arrhythmogenic areas showed differences from lesions produced on canine epicardium. Lesions from the human cases were less predictable and not well circumscribed. These differences are felt to be due to optical inhomogeneities present in diseased, scarred human myocardium, geometric irregularities of the endocardial surface, anatomical constraints on tissue-fiber distance, and the angle of incidence of the beam with the tissue. Modifications of current delivery systems may overcome some of these limitations. Ablation of ventricular tachycardia arising deeper than 4.0 to 6.0 mm. from the irradiated surface may require interstitial probes coupled to the fiberoptic.

Paper Details

Date Published: 1 April 1987
PDF: 8 pages
Proc. SPIE 0713, Optical Fibers in Medicine II, (1 April 1987); doi: 10.1117/12.937375
Show Author Affiliations
Robert H. Svenson, Heineman Medical Research Center and Carolinas Heart Institute (United States)
Marie-Claire Marroum, Heineman Medical Research Center and Carolinas Heart Institute (United States)
Frank Frank, Heineman Medical Research Center and Carolinas Heart Institute (United States)
Jay G. Selle, Heineman Medical Research Center and Carolinas Heart Institute (United States)
John J. Gallagher, Heineman Medical Research Center and Carolinas Heart Institute (United States)
George Bou-Saba, Heineman Medical Research Center and Carolinas Heart Institute (United States)
Kathleen T. Seifert, Heineman Medical Research Center and Carolinas Heart Institute (United States)
Kathy Linder, Heineman Medical Research Center and Carolinas Heart Institute (United States)
George P. Tatsis, Heineman Medical Research Center and Carolinas Heart Institut (United States)


Published in SPIE Proceedings Vol. 0713:
Optical Fibers in Medicine II
Abraham Katzir, Editor(s)

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