Document Detail


Regional heterogeneity of myocardial perfusion in healthy human myocardium: assessment with magnetic resonance perfusion imaging.
MedLine Citation:
PMID:  15137334     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The knowledge of myocardial perfusion in healthy volunteers is fundamental for evaluation of patients with ischemic heart disease. The study was conducted to determine range, regional variability, and transmural gradient of myocardial perfusion in normal volunteers with Magnetic Resonance Perfusion Imaging (MRPI). Perfusion was assessed in 17 healthy volunteers (age: 20-47 yr, 11 males) at rest and adenosine-induced hyperemia using a 1.5 T MR scanner. Perfusion was quantified (mL/g/min) for the transmural myocardium and separately for the endo- and epimyocardium in the anterior, lateral, posterior, and septal left ventricular wall using the Fermi model for constrained deconvolution. Regional variabilities for resting, hyperemic perfusion, and perfusion reserve were 22 +/- 8%, 21 +/- 10%, and 35 +/- 18%. Mean resting, hyperemic perfusion, and perfusion reserve were 1.1 +/- 0.4 mL/g/min, 4.2 +/- 1.1 mL/g/min, and 4.1 +/- 1.4. Perfusion in the septum was higher at rest (1.3 +/- 0.3 mL/g/min vs. 1.0 +/- 0.3 mL/g/min, p < 0.05) and lower during hyperemia (3.6 +/- 0.8 mL/g/min vs. 4.5 +/- 1.1 mL/g/min, p < 0.03), resulting in a reduced perfusion reserve (PR) (3.2 +/- 0.9 vs. 4.5 +/- 1.4, p < 0.01) in the septum vs. the combined anterior, lateral, and posterior segments. Resting (0.9 +/- 0.3 mL/g/min vs. 1.4 +/- 0.5 mL/g/min, p < 0.01), but not hyperemic perfusion, was lower in the epi- vs. endomyocardium, resulting in a higher epimyocardial PR (4.8 +/- 1.8 vs. 3.5 +/- 1.4, p < 0.01) in all regions but the septum, where endo- and epimyocardial perfusion and perfusion reserve were not different. A considerable regional variability of myocardial perfusion was confirmed with MRPI. The exceptional anatomical position of the septum is reflected by the lack of a perfusion gradient, which was demonstrated in all other regions but the septum.
Authors:
Olaf M Muehling; Michael Jerosch-Herold; Prasad Panse; Andrey Zenovich; Betsy V Wilson; Robert F Wilson; Norbert Wilke
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance     Volume:  6     ISSN:  1097-6647     ISO Abbreviation:  J Cardiovasc Magn Reson     Publication Date:  2004  
Date Detail:
Created Date:  2004-05-12     Completed Date:  2004-09-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9815616     Medline TA:  J Cardiovasc Magn Reson     Country:  United States    
Other Details:
Languages:  eng     Pagination:  499-507     Citation Subset:  IM    
Affiliation:
Section of Cardiovascular MRI, Department of Diagnostic Radiology, University of Minnesota Medical School, Minneapolis, Minnesota, USA. omuehlin@helios.med.uni-muenchen.de
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MeSH Terms
Descriptor/Qualifier:
Adult
Coronary Circulation / physiology*
Female
Heart / anatomy & histology*
Heart Septum / pathology,  physiology
Humans
Hyperemia / pathology,  physiopathology
Magnetic Resonance Angiography / methods*
Male
Middle Aged
Rest / physiology
Sex Factors

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


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