| Assessment of myocardial viability by MR imaging. | |
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MedLine Citation:
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PMID: 12541110 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Diagnosis of myocardial viability after infarction focuses on the prediction of functional improvement of dysfunctional myocardium after revascularization therapy. Magnetic resonance imaging provides different approaches for the detection of myocardial viability. Measurement of end-diastolic wall thickness is easy to perform and has a high sensitivity, but a low specificity, and can only be used 4 months after myocardial infarction due to infarct healing processes. Low-dose dobutamine stress has a good sensitivity with a high specificity for the prediction of wall motion improvement, but this is only true for patients with a singular dysfunctional area and only slightly depressed cardiac function. Late enhancement allows for direct visualization of necrotic or scarred tissue. By measuring the transmural extent of late enhancement, the probability of mechanical improvement can precisely be given. Imaging of microvascular obstruction by first-pass perfusion or late enhancement gives additional information on viability and patient prognosis. Metabolic imaging techniques, such as (31)P-MR spectroscopy and (23)Na-MR imaging, provide further insights into the mechanisms of myocardial infarction and viability. In conclusion, cardiac MRI offers several clinically usable approaches for the assessment of myocardial viability and will probably become the method of choice in the near future. |
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Authors:
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Jörn J W Sandstede |
Publication Detail:
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Type: Journal Article Date: 2002-10-23 |
Journal Detail:
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Title: European radiology Volume: 13 ISSN: 0938-7994 ISO Abbreviation: Eur Radiol Publication Date: 2003 Jan |
Date Detail:
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Created Date: 2003-01-23 Completed Date: 2003-05-15 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9114774 Medline TA: Eur Radiol Country: Germany |
Other Details:
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Languages: eng Pagination: 52-61 Citation Subset: IM |
Affiliation:
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Institut für Röntgendiagnostik, Bayerische Julius-Maximilians-Universität Würzburg, Klinikstrasse 8, 97070 Würzburg, Germany. joern.sandstede@mail.uni-wuerzburg.de |
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Contrast Media Dobutamine / diagnostic use Female Gadolinium DTPA / diagnostic use Humans Magnetic Resonance Imaging* Magnetic Resonance Imaging, Cine Magnetic Resonance Spectroscopy Male Middle Aged Myocardial Contraction* Myocardial Infarction / pathology, physiopathology*, therapy Myocardial Revascularization Myocardium / metabolism, pathology* Sensitivity and Specificity |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media; 34368-04-2/Dobutamine; 80529-93-7/Gadolinium DTPA |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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