| MRI-radiofrequency tissue tagging in patients with aortic insufficiency before and after operation. | |
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MedLine Citation:
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PMID: 9564907 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Magnetic resonance imaging tissue tagging is a relatively recent methodology that describes ventricular systolic function in terms of intramyocardial ventricular deformation. Because the analysis involves the use of many intramyocardial points to describe systolic deformation, it is theoretically more sensitive at describing subtle differences in regional myocardial fiber shortening when compared with conventional measures of ventricular function such as wall thickening. The objectives of this study were (1) to define sensitive indices of ventricular systolic deformation to assist the clinician in the surgical evaluation of patients with aortic insufficiency, and (2) to quantify differences in regional systolic deformation before and after surgery for aortic insufficiency. METHODS: Magnetic resonance imaging with tissue tagging was performed on 10 normal volunteers and 8 patients with chronic severe aortic insufficiency. Follow-up postoperative studies (5.4+/-1.1 months) were obtained in 6 patients who underwent Ross procedure (1 patient), David procedure (1), and St. Jude aortic valve replacement (4). RESULTS: There was no significant difference in fractional area change, overall circumferential shortening, or overall radial thickening among the normal group, the preoperative aortic insufficiency group, or the postoperative aortic insufficiency group. However, on a regional basis, there was a decrease in posterior wall circumferential strains in the postoperative aortic insufficiency group (29%+/-13% preoperative aortic insufficiency (n=6) versus 24%+/-12% postoperative aortic insufficiency (n=6), p=0.02). CONCLUSIONS: On regional analysis, there was a small but significant decrease in posterior wall circumferential shortening after operation. Magnetic resonance imaging tissue tagging is a sensitive and clinically applicable method of quantifying regional ventricular wall function before and after intervention for aortic insufficiency. |
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Authors:
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F F Ungacta; V G Dávila-Román; M J Moulton; B P Cupps; P Moustakidis; D S Fishman; R Actis; B A Szabo; D Li; N T Kouchoukos; M K Pasque |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: The Annals of thoracic surgery Volume: 65 ISSN: 0003-4975 ISO Abbreviation: Ann. Thorac. Surg. Publication Date: 1998 Apr |
Date Detail:
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Created Date: 1998-05-14 Completed Date: 1998-05-14 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 15030100R Medline TA: Ann Thorac Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 943-50 Citation Subset: AIM; IM |
Affiliation:
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Department of Surgery, Washington University, St. Louis, Missouri, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aortic Valve Insufficiency / diagnosis, pathology, physiopathology*, surgery Diastole Evaluation Studies as Topic Female Follow-Up Studies Heart Valve Prosthesis Heart Valve Prosthesis Implantation Heart Ventricles / pathology Humans Image Processing, Computer-Assisted / methods* Magnetic Resonance Imaging / methods* Male Middle Aged Muscle Fibers, Skeletal / physiology, ultrastructure Myocardial Contraction / physiology Myocardium / pathology Sensitivity and Specificity Stress, Mechanical Systole Ventricular Function, Left / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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