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SHR Neuro Cancer Cardio Lipid Metab Microb
Beer, M; Spindler, M; Sandstede, JJW; Remmert, H; Beer, S; Kostler, H; Hahn, D.
Detection of myocardial infarctions by acquisition-weighted P-31-MR spectroscopy in humans
J Magn Reson Imaging. 2004; 20(5):798-802
Doi: 10.1002/jmri.20185
Web of Science
PubMed
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- Leading authors Med Uni Graz
- Beer Meinrad
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- Abstract:
- Purpose: To determine whether the recently applied technique of acquisition-weighted P-31-MR spectroscopy (AW-MRS) allows for the detection of depressed energy metabolism in patients with inferior wall myocardial infarctions. Materials and Methods: Eight patients with subacute myocardial infarction and wall motion abnormalities restricted to the inferior wall were examined with a 1.5-T MR scanner. Global and regional left ventricular (LV) function was assessed by cine MRI, and the size and extent of myocardial infarction was assessed by late enhancement (LE). MRS was performed with an AW three-dimensional chemical shift imaging sequence. Phosphocreatine/ATP ratios were determined with the postprocessing model AMARES for four voxels positioned in the anterior, lateral, inferior, and septal parts of the LV. Results: The LV ejection fraction (EF) was reduced to 37.5% +/- 9.0%. Seven of eight patients had transmural LE in the inferior wall, and one patient showed subendocardial enhancement in the inferior-lateral parts. Phosphocreatine/ATP ratios of the inferior wall were significantly reduced (P < 0.05) compared to all other parts of the LV (1.03 +/- 0.39 (inferior), 1.67 +/- 0.81 (lateral), 1.73 +/- 0.29 (anterior), and 1.49 +/- 0.31 (septal)). The ratios in five of seven patients with transmural enhancement were <1.00 in the inferior wall. Conclusion: Acquisition weighting allows for the detection of inferior wall infarctions in patients. Transmural signal enhancement is associated with significant depression of phosphocreatine/ATP ratios. (C) 2004 Wiley-Liss, Inc.
- Find related publications in this database (using NLM MeSH Indexing)
- Adenosine Triphosphate - metabolism
- Adult -
- Aged -
- Humans -
- Image Processing, Computer-Assisted - methods
- Imaging, Three-Dimensional - methods
- Magnetic Resonance Spectroscopy - methods
- Male -
- Middle Aged -
- Myocardial Infarction - diagnosis Myocardial Infarction - metabolism
- Myocardium - metabolism Myocardium - pathology
- Phosphocreatine - metabolism
- Phosphorus Isotopes -
- Reference Values -
- Statistics, Nonparametric -
- Find related publications in this database (Keywords)
- cardiac MR
- MR spectroscopy
- myocardial infarction
- high-energy phosphates
- late enhancement