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Value of gated SPECT in the analysis of regional wall motion of the interventricular septum after coronary artery bypass grafting

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European Journal of Nuclear Medicine and Molecular Imaging Aims and scope Submit manuscript

Abstract

Purpose

The aim of this study was the evaluation of septal wall motion, perfusion and wall thickening after CABG in two groups of consecutive patients, one with grafted left anterior coronary artery and no history of myocardial infarction, and the other with previous anteroseptal myocardial infarction and impaired septal motion before surgery. The issue addressed was the ability of gated SPECT to differentiate between true paradoxical septal motion, characterised by paradoxical wall motion, depressed ejection fraction (EF), poor viability and compromised wall thickening, and pseudo-paradoxical motion, characterised by abnormal wall motion and regional EF but preserved perfusion and wall thickening.

Methods

One hundred and thirty-two patients with previous anterior myocardial infarction, 82 patients with left anterior descending coronary disease and no history of myocardial infarction and 27 normal subjects underwent rest gated SPECT after 99mTc-sestamibi injection, according to the standard QGS protocol. Quantitative regional EF, regional perfusion, regional wall motion and regional wall thickening were determined using a 20-segment model.

Results

Despite the presence of similar regional wall motion impairment in patients with and patients without septal infarction, in terms of regional EF (2.5%±3% vs 1.9%±4.9% p=NS) and inward septal motion (3±4.9 mm vs 2.3±6.1 mm p=NS), significant differences were observed in both perfusion (74.7%±6.2% vs 63.3%±13%, p>0.0001) and regional wall thickening (17.2%±7.4% vs 12.6%±7.2%, p>0.0001).

Conclusion

Gated SPECT with perfusion tracers can reliably differentiate pseudo-paradoxical from true paradoxical septal motion in patients with previous CABG, and it may be the method of choice for evaluating left ventricular performance in this patient population.

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Authors and Affiliations

  1. Department of Nuclear Medicine, Spedali Civili di Brescia, Piazza Spedali Civili, 1, 25124, Brescia, Italy

    Raffaele Giubbini, Pierluigi Rossini, Francesco Bertagna, Giovanni Bosio, Barbara Paghera, Claudio Pizzocaro, Silvana Canclini & Arturo Terzi

  2. Artificial Intelligence Program, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA

    Guido Germano

Authors
  1. Raffaele Giubbini
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  2. Pierluigi Rossini
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  3. Francesco Bertagna
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  4. Giovanni Bosio
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  5. Barbara Paghera
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  6. Claudio Pizzocaro
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  7. Silvana Canclini
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  8. Arturo Terzi
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  9. Guido Germano
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Correspondence to Raffaele Giubbini.

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Giubbini, R., Rossini, P., Bertagna, F. et al. Value of gated SPECT in the analysis of regional wall motion of the interventricular septum after coronary artery bypass grafting. Eur J Nucl Med Mol Imaging 31, 1371–1377 (2004). https://doi.org/10.1007/s00259-004-1569-y

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  • DOI: https://doi.org/10.1007/s00259-004-1569-y

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