| Ultrasonic characterization of myocardial photocoagulation lesion size in vivo during Nd:YAG laser irradiation. | |
| | |
MedLine Citation:
|
PMID: 8006180 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Endocardial coagulation lesions were created using transcatheter continuous-wave Nd:YAG laser irradiation. Ultrasound monitoring of thermal lesion dimensions was performed using 7.5-MHz and 10-MHz transducers directly from the epicardial surface in short-axis configuration (group A) or through the chest wall (group B). A total of 33 lesions were created in 10 dogs at energy levels ranging from 300 J to 1000 J. Mean histological lesion width (HW) compared with ultrasonically determined mean width (UW) showed that the differences (mean +/- standard deviation) in group A (UW - HW) was = 1.14 +/- 0.8 mm, which was not statistically significantly different from zero. In group B, (UW - HW) = 2.04 mm +/- 0.7 mm (p < .05), which was statistically significantly different from zero. Mean histological depth (HD) differentially related to ultrasound mean depth (UD) for group A and B combined showed (UD - HD) = -0.19 mm +/- 0.46 mm, not statistically significantly different from zero. The frequency distribution for width in group A showed magnitude of UW-HW > 3 mm in 32% of cases. In group B magnitude of UW-HW > 3 mm in 15%, whereas ultrasound width was larger than histology in 75% of the cases. For depth, magnitude of UD-HD > 3 mm in 15% of cases. With further refinement of the technique, ultrasonic tissue characterization may become a useful adjunct to monitoring lesion dimensions during transcatheter laser photocoagulation. |
| | |
Authors:
|
R Splinter; J R Tuntelder; C H Chuang; M Thompson; L Littmann; R H Svenson; K R Dezern; G P Tatsis |
Publication Detail:
|
Type: Comparative Study; Journal Article |
Journal Detail:
|
Title: Journal of clinical ultrasound : JCU Volume: 22 ISSN: 0091-2751 ISO Abbreviation: J Clin Ultrasound Publication Date: 1994 May |
Date Detail:
|
Created Date: 1994-07-21 Completed Date: 1994-07-21 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0401663 Medline TA: J Clin Ultrasound Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 221-9 Citation Subset: IM |
Affiliation:
|
Laser and Applied Technologies Laboratory, Carolinas Medical Center, Charlotte, North Carolina 28203. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Body Temperature Cardiomyopathies / etiology*, pathology, ultrasonography* Dogs Echocardiography* Feasibility Studies Female Heart / radiation effects Heart Catheterization Laser Coagulation / adverse effects* Male Monitoring, Physiologic Myocardium / pathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Congenital glenoid dysplasia: case report in two consecutive generations.
Next Document: Evaluation of Doppler echocardiographic atrial pacing stress test in the detection of coronary arter...