| Catheterization technique for laser photoablation of atrioventricular conduction from the aortic root in dogs. | |
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MedLine Citation:
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PMID: 7681190 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A simple catheterization technique for producing suppression or block of atrioventricular (AV) conduction in dogs by neodymium:YAG (Nd:YAG) laser photocoagulation from the aortic root is described. In 14 canines, electrode catheters were percutaneously advanced to the high right atrium, to the His bundle area at the tricuspid valve (right His [RH]), and the noncoronary cusp of the aortic valve (left His [LH]). A 400 microns optical fiber was fed into the lumen of the LH catheter. Continuous wave Nd:YAG lasing at lambda = 1,064 nm at 15-20 watts was performed at the site of the largest recorded LH deflection, opposite to the RH catheter, until complete AV block (CAVB, group I, eight dogs) or persistent A-H prolongation (AHPr, group II, four dogs) occurred; in two animals, laser photoablation was unsuccessful. CAVB and AHPr were achieved in < 140 seconds of lasing. Mean lasing time was 51 +/- 41 seconds, total energy delivered, 776 +/- 601 J. There were no complications. Dogs were followed for up to 120 days. In group I, 6/6 dogs followed for at least 1 week continued to have CAVB (three AV nodal, five infra-His). In group II, 1/4 dog progressed to infra-His CAVB; 3/4 had depressed AV nodal function. AV block was not reversed by isoproterenol. Aortic root angiograms revealed intact valve function in all. Histology showed various degrees of damage and repair of AV junctional tissue. There were no valvular perforations. Transcatheter Nd:YAG laser photocoagulation of the AV junction from the aortic root is a fast, simple, and safe method for creating AV conduction block in dogs. |
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Authors:
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L Littmann; R H Svenson; C H Chuang; P Kempler; R Splinter; J R Tuntelder; G P Tatsis |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 16 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 1993 Mar |
Date Detail:
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Created Date: 1993-04-22 Completed Date: 1993-04-22 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 401-6 Citation Subset: IM |
Affiliation:
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Laser and Applied Technologies Laboratory, Carolinas Heart Institute, Charlotte, North Carolina 28232. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Aorta Atrioventricular Node / pathology, surgery* Bundle of His / pathology Cardiac Pacing, Artificial Catheter Ablation / instrumentation, methods Dogs Female Heart Block / etiology*, pathology Laser Coagulation* Male |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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