Abstract
Background Stress perfusion CMR accurately identifies inducible perfusion defects, but its role prior to coronary artery bypass surgery (CABG) is unclear. Similarly, late gadolinium enhancement (LGE) in CMR is well established in the identification of viability, but prognostic value postCABG is uncertain. Out of the 2600 stress perfusion studies performed at our centre from 2008-2009, early postoperative outcomes were assessed in 56 consecutive patients who had CABG following a CMR scan. 28 patients underwent adenosine stress perfusion imaging, while all 56 underwent LGE imaging.
Highlights
Stress perfusion CMR accurately identifies inducible perfusion defects, but its role prior to coronary artery bypass surgery (CABG) is unclear
Out of the 2600 stress perfusion studies performed at our centre from 2008-2009, early postoperative outcomes were assessed in 56 consecutive patients who had CABG following a CMR scan. 28 patients underwent adenosine stress perfusion imaging, while all 56 underwent late gadolinium enhancement (LGE) imaging
Mean left ventricular (LV) end diastolic volumes (EVD) were increased at 204 ± 10 mls, with a low mean ejection fraction (EF) of 28 ± 2.5%. 24 patients out of 56 had LGE with 3 or more non-viable segments, and had a significantly longer post-operative stay (11.1 ± 1.2 vs 7.4 ± 0.6 days, p < 0.01), and more severe LV impairment and dilatation (EF 27 ± 2.0 vs 50 ± 3.5%, p < 0.01, EDV 242 ± 13 vs 161 ± 12 mls, p < 0.0001)
Summary
Stress perfusion CMR accurately identifies inducible perfusion defects, but its role prior to coronary artery bypass surgery (CABG) is unclear. Late gadolinium enhancement (LGE) in CMR is well established in the identification of viability, but prognostic value postCABG is uncertain. Out of the 2600 stress perfusion studies performed at our centre from 2008-2009, early postoperative outcomes were assessed in 56 consecutive patients who had CABG following a CMR scan. 28 patients underwent adenosine stress perfusion imaging, while all 56 underwent LGE imaging Out of the 2600 stress perfusion studies performed at our centre from 2008-2009, early postoperative outcomes were assessed in 56 consecutive patients who had CABG following a CMR scan. 28 patients underwent adenosine stress perfusion imaging, while all 56 underwent LGE imaging
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