Document Detail


Tissue edema does not change gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA)-enhanced T1 relaxation times of viable myocardium.
MedLine Citation:
PMID:  15906335     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To determine whether tissue edema changes gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA)-enhanced T1 relaxation times of the viable myocardium. MATERIALS AND METHODS: A total of 16 isolated pig hearts were divided into four groups (N=4/group) and perfused in a Langendorff apparatus. Gd-DTPA was injected into the aortic perfusion line. Tissue edema was then induced by two hours of simultaneous arterial/venous perfusion (SAVP). Myocardial water content and T1 relaxation times were monitored throughout SAVP. The volumes of the extracellular and intracellular compartments were assessed using 31P MRS-detectable markers, phenylphosphonic acid (PPA) and dimethyl methylphosphonate (DMMP). RESULTS: Tissue water content in both viable and infarcted myocardium increased significantly during two-hour SAVP. However, Gd-DTPA-enhanced T1 relaxation times of the viable myocardium remained relatively unchanged. Infarcted myocardium, on the other hand, exhibited significant T1 shortening during SAVP. Furthermore, SAVP resulted in significant expansions of both extracellular and intracellular compartments, but the ratio of the volumes of the two compartments remained relatively constant. CONCLUSION: Tissue edema in the viable myocardium does not increase the relative distribution volume of the contrast agent. As a result, edema does not change Gd-DTPA-enhanced T1 relaxation times of the viable myocardium.
Authors:
Gang Li; Bo Xiang; Guangping Dai; Anthony Shaw; Hongyu Liu; Baofeng Yang; Mike Jackson; Roxanne Deslauriers; Ganghong Tian
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Publication Detail:
Type:  Clinical Conference; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of magnetic resonance imaging : JMRI     Volume:  21     ISSN:  1053-1807     ISO Abbreviation:  J Magn Reson Imaging     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2005-05-25     Completed Date:  2005-09-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9105850     Medline TA:  J Magn Reson Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  744-51     Citation Subset:  IM    
Affiliation:
Institute for Biodiagnostics, National Research Council, Winnipeg, Canada.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Animals
Contrast Media / pharmacokinetics*
Disease Models, Animal
Edema / metabolism*
Gadolinium DTPA / pharmacokinetics*
Magnetic Resonance Imaging / methods*
Magnetic Resonance Spectroscopy / methods*
Myocardium / metabolism*
Spectroscopy, Near-Infrared
Swine
Chemical
Reg. No./Substance:
0/Contrast Media; 80529-93-7/Gadolinium DTPA

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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