Successful Nd:Yag Laser Photocoagulation Of Arrhythmogenic Myocardium: Potential Limitations Of Current Optical Delivery Systems.

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

doi:10.1117/12.937375

1 April 1987 Successful Nd:Yag Laser Photocoagulation Of Arrhythmogenic Myocardium: Potential Limitations Of Current Optical Delivery Systems.

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

Author Affiliations +

Proceedings Volume 0713, Optical Fibers in Medicine II; (1987) https://doi.org/10.1117/12.937375
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States

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.

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Robert H. Svenson, Marie-Claire Marroum, Frank Frank, Jay G. Selle, John J. Gallagher, George Bou-Saba, Kathleen T. Seifert, Kathy Linder, and George P. Tatsis "Successful Nd:Yag Laser Photocoagulation Of Arrhythmogenic Myocardium: Potential Limitations Of Current Optical Delivery Systems.", Proc. SPIE 0713, Optical Fibers in Medicine II, (1 April 1987); https://doi.org/10.1117/12.937375

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