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31P-MR Spectroscopy for the evaluation of energy metabolism in intact residual myocardium after acute myocardial infarction in humans

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Abstract

Objective

experimental studies have demonstrated that acute myocardial infarction (MI) alters energy metabolism even in non-infarcted adjacent tissue. In patients with subacute MI, the influence of the regional ischemie insult on energy metabolism of intact septal myocardium was analyzed using31P-Magnetic resonance spectroscopy (MRS).

Patients and Methods

in eight patients with wall motion abnormalities in the anterior wall31P-spectra were obtained from non-infarcted adjacent scptal myocardium, as well as infarcted anterior myocardium (voxel size 25 ccm each) 29 ±8 days after MI using a 3D-CSI technique. Additionally, cardiac function was analyzed using breath-hold cine MRI. MR1 was repeated 6 months after revascularization to assess viability of infarcted segments. Eight age-matched healthy volunteers served as control group.

Results

according to follow-up MRI 4/8 patients showed regional wall motion recovery. Here, PCr/ATP-ratios were not significantly reduced in intact septal myocardium as well as infarcted anterior myocardium compared to healthy volunteers (1.28 ±0.10 and 1.14 ±0.09 vs. 1.45 ±0.29). No recovery of regional function was detected in 4/8 patients with —therefore—non-viable anterior myocardium. PCr/ATP-ratios were significantly reduced in intact and infarcted myocardium compared with healthy volunteers as well as to patients with wall motion recovery (0.77 ±0.17 and 0.49 ±0.23;P < 0.05).

Discussion

these preliminary results indicate that energy metabolism is reduced in patients with persisting wall motion abnormalities after myocardial infarction and revascularization in ischemically injured as well as in adjacent non-injured myocardium.

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Authors and Affiliations

  1. Institut für Röntgendiagnostik, Universität Würzburg, Josef-Schneider-Straβe 2, 970S0, Wurzburg, Germany

    M. Beer, S. Buchner, J. Sandstede, M. Viehrig, C. Lipke, A. Krug, H. Köstler, T. Pabst, W. Kenn & D. Hahn

  2. Physikalisches Institut V, Universität Würzburg, Josef-Schneider-Straβe 2, 97080, Wurzburg, Germany

    W. Landschütz & M. von Kienlin

  3. Medizinische Klinik, Universität Würzburg, Josef-Schneider-Straβe 2, 970S0, Wurzburg, Germany

    K. Harre

  4. Department of Cardiovascular Medicine, John Radcliffe Hospital, Oxford University, Oxford, UK

    S. Neubauer

Authors
  1. M. Beer
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  2. S. Buchner
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  3. J. Sandstede
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  4. M. Viehrig
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  5. C. Lipke
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  6. A. Krug
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  7. H. Köstler
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  8. T. Pabst
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  9. W. Kenn
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  10. W. Landschütz
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  11. M. von Kienlin
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  12. K. Harre
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  13. S. Neubauer
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  14. D. Hahn
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Corresponding author

Correspondence to M. Beer.

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Beer, M., Buchner, S., Sandstede, J. et al. 31P-MR Spectroscopy for the evaluation of energy metabolism in intact residual myocardium after acute myocardial infarction in humans. MAGMA 13, 70–75 (2001). https://doi.org/10.1007/BF02668154

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  • DOI: https://doi.org/10.1007/BF02668154

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