Abstract
Laser photocoagulation of myocardium is an alternative to surgical resection in the treatment of drug resistant ventricular tachycardia. In certain areas, of the heart, however, bare fibre delivery of laser energy involves a risk of unintentional damage to nearby structures. The purpose of the study was to determine whether Nd-YAG laser irradiation, delivered with the transparent contact probe, would produce adequate laser photocoagulation of the canine myocardium in comparison to bare fibre delivery of the laser energy. In nine mongrel dogs, continuous wave Nd-YAG laser irradiation with and without a transparent contact probe was directed at the epicardium. Pulse power was 10, 15 and 20 W, pulse duration 5, 7 and 10 s, and spot size was 1 mm. A total of 178 lesions were analyzed microscopically. After a 200 J pulse energy delivered by the contact probe, the lesion depth was 4.9±0.5 mm (mean±s.d.), which is usually adequate to ablate arrhythmia sites. Bare fibre delivery of laser energy did not produce deeper lesions. There was no difference between the bare fibre and the transparent probe in the occurrence of major arrhythmias (4/86 bare fibre, 3/92 transparent probe). We conclude that the transparent contact probe allows safe and effective laser irradiation of sites of origin of ventricular arrhythmias.
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References
Josephson ME, Harken AH, Horowitz LN. Endocardial excision: a new surgical technique for the treatment of recurrent ventricular tachycardia.Circulation 1979,60:1430–9.
McGiffin DC, Kirklin JK, Plumb VJ et al. Relief of life-threatening ventricular tachycardia and survival after direct operations.Circulation 1987,76 (Suppl V):V93-V103
Haines DE, Lerman BB, Kron IL, DiMarco JP. Surgical ablation of ventricular tachycardia with sequential map-guided subendocardial resection: electrophysiologic assessment and long-term follow-up.Circulation 1988,77:131–41
Ben-Sachar G, Sivakoff MC, Bernard SL et al. Acute continuous argon-laser induced tissue effects in the isolated canine heart.Am Heart J 1985,110:65–70
Saksena S, Ciccone JM, Chandran P et al. Laser ablation of normal and diseased human ventricle.Am Heart J 1986 1112:52–60
Lee BI, Rodriguez R, Notargiocomo A et al. Thermal effects of laser and electrical discharge on cardiovascular tissue: implications for coronary artery recanalization and endocardial ablation.J Am Coll Cardiol 1986,8:193–200
Obelienus V, Knepa A, Lubite Y et al. Histologic studies of myocardium zones irradiated with Nd-YAG laser.Laser Surg Med 1985,5:475–83
Bruneval P, Mesnildrey P, Camilleri P. Nd-YAG laser-induced injury in dog myocardium: optical and ultrastructural study of early lesions.Eur Heart J 1987,8:785–92
Svenson RH, Gallagher JJ, Selle JG et al. Neodymium-YAG laser photocoagulation: a successful new mapguided technique for the intraoperative ablation of ventricular tachycardia.Circulation 1987,76:1319–28
Bakker PFA, Svenson RH, Rienks R et al. Effects of Neodymium-YAG laser ablation of the left ventricular posterior papillary muscle on mitral valve competence and cardiac performance In: PFA Bakker.,Ablation of the Left Ventricular Posterior Papillary Muscle and Subjacent Ventricular Wall. Utrecht, The Netherlands: University of Utrecht, Dissertation, 1990:77–92
Daikuzono N, Joffe SN. Artificial sapphire probe for contact photocoagulation and tissue vaporization with the Nd:YAG laser.Med Instr 1985,19:173–8
Horowitz LN, Josephson ME, Harken AH. Epicardial and endocardial activation during sustained ventricular tachycardia in man.Circulation 1980,61:1227–38
Fenoglio JJ, Pham TD, Harken AH et al. Recurrent sustained ventricular tachycardia: structure and ultrastructure of subendocardial regions in which tachycardias originate.Circulation 1983,68:518–33
De Bakker JMT, Coronel R, Tasseron S et al. Ventricular tachycardia in the infarcted, Langendorff-perfused human heart: role of the arrangement of surviving cardiac fibres.J Am Coll Cardiol 1990,15:1594–1607
Littmann L, Svenson RH, Gallagher JJ et al. Functional role of the epicardium in postinfarction ventricular tachycardia: observations derived from computerized epicardial activation mapping, entrainment, and epicardial laser photoablation.Circulation 1991,83:1577–91
Saksena S, Hussain M, Gielchinsky I et al. Intraoperative mapping-guided argon laser ablation of malignant ventricular tachycardia.Am J Cardiol 1987,59:78–83
Isner JM, Estes NAM, Payne DD et al. Laser-assisted endocardiectomy for refractory ventricular tachyarrhythmias: preliminary intra-operative experience.Clin Cardiol 1987,10:201–4
Derbyshire GJ, Bogen DK, Unger M. Thermally induced optical property changes in myocardium at 1.06 micrometer.Lasers Surg Med 1990,10:28–34
Splinter R, Svenson RH, Littmann L et al. Optical properties of normal, diseased, and laser photocoagulated myocardium at the Nd-YAG wavelength.Lasers Surg Med 1991,11:117–24
Miller JM, Kienzle MG, Harken AH, Josephson ME. Subendocardial resection for ventricular tachycardia: predictors of surgical successCirculation 1984,70:624–31
Lee BI, Gottdiener JS, Fletcher RD et al. Transcatheter ablation: comparison between laser photoablation and electrode shock ablation in the dog.Circulation 1985,71:579–86
Vincent GM, Fox J, Benedick BA et al. Laser catheter ablation of simulated ventricular tachycardia.Lasers Surg Med 1987,7:421–5
Vincent GM, Fox J, Knowlton K, Dixon JA. Catheter-directed Neodymium-YAG laser injury of the left ventricle for arrhythmia ablation: dosimetry and hemodynamic, hematologic, and electrophysiologic, effects.Lasers Surg Med 1989,9:446–53
Weber H, Enders S, Keiditisch E. Percutaneous Nd-YAG laser coagulation of ventricular myocardium in dogs using a special electrode laser catheter.PACE 1989,12:899–910
Littmann L, Svenson RH, Chuang CH et al. Contact epicardial lasing with Neodymium-YAG: a new method of achieving deep myocardial photocoagulation in dogs. [Abstract]Laser Surg Med 1991,11 (Suppl 3):14
Marchesini R, Andreola S, Emanuelli H et al. Temperature rise in biological tissue during Nd-YAG laser irradiation.Lasers Surg Med 1985,5:75–82
Verdaasdonk RM, Borst C, Gemert MJC van. Explosive onset of continuous wave laser tissue ablation.Physics Medicine Biol 1990,35:1129–44
LeCarpentier GHL, Motamedi M, Welch AJ. Effects of pressure rise on cw laser ablation of tissue. In: Jacques (ed.)Laser-tissue Interaction. Vol. 1427. Bellingham: Proceedings, SPIE, 1991 (in press)
Weber H, Enders S, Coppenrath K et al. Effects of Nd-YAG laser coagulation of myocardium on coronary vessels.Lasers Surg Med 1990,10:133–9
Thomsen S, Pearce J, Straight R. Changes of birefringence in myocardium as a low temperature marker of thermal damage. [Abstract]Lasers Surg Med 1989,9 (Suppl 1):11
Levine JH, Merillat JC, Stern M et al. The cellular electrophysiologic changes induced by ablation: comparison between argon laser photoablation and highenergy electrical ablation.Circulation 1987,76:217–25
Vincent GM, Benedick BA, Fox J et al. Neodymium-YAG laser left ventricular injury in not, arrhythmogenic. [Abstract]Circulation 1986,74:II-497
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Rienks, R., Verdaasdonk, R.M., Svenson, R.H. et al. Nd-YAG laser photocoagulation of canine myocardium with the transparent contact probe. Laser Med Sci 7, 441–447 (1992). https://doi.org/10.1007/BF02594086
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DOI: https://doi.org/10.1007/BF02594086