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Quantitative evaluation of the amount of delayed myocardial enhancement as a predictor of systolic dysfunction.

Authors
  • Shriki, J E
  • Surti, K
  • Farvid, A
  • Shinbane, J S
  • Colletti, P M
Type
Published Article
Journal
The Open Cardiovascular Medicine Journal
Publisher
Bentham Science
Publication Date
Jan 01, 2009
Volume
3
Pages
35–38
Identifiers
DOI: 10.2174/1874192400903010035
PMID: 19557148
Source
Medline
License
Unknown

Abstract

30 patients with delayed contrast enhancement in patterns suggestive of myocardial infarctions were reviewed. Infarct mass was quantitatively measured using short axis images obtained in the delayed phase of gadopentetate administration. Left ventricular mass and ejection fraction were measured using short axis, steady state free precession images. A relationship is drawn between increased mass of infarction and decreased left ventricular ejection fraction. For each gram of infarct, there is a 0.5 % reduction in ejection fraction (EF = 50 - (0.48 x gm infarcted myocardium); r²= 0.49). For each % increase of infarcted myocardium, there is a 0.67 % reduction in ejection fraction (EF = 50 - (0.67 x percent of infarcted myocardium); r²= 0.39). Left ventricular ejection fraction correlates inversely with the mass of myocardium with delayed enhancement on cardiac MRI.

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