Stress BOLD CMR at 3.0 Tesla accurately detected significant coronary artery disease with an AUC of 0.82, significantly outperforming rest imaging (AUC 0.61, p=0.015).
Cross-Sectional (n=46)
Single-blind
No
Absolute Event Rate: 0.82% vs 0.61%
p-value: p=0.015
BACKGROUND: The purpose of this study was to determine the ability of blood oxygen level dependent (BOLD) cardiovascular magnetic resonance (CMR) to detect stress-inducible myocardial ischemic reactions in the presence of angiographically significant coronary artery disease (CAD). METHODS: Forty-six patients (34 men; age 65 ± 9 years,) with suspected or known coronary artery disease underwent CMR at 3Tesla prior to clinically indicated invasive coronary angiography. BOLD CMR was performed in 3 short axis slices of the heart at rest and during adenosine stress (140 μg/kg/min) followed by late gadolinium enhancement (LGE) imaging. In all 16 standard myocardial segments, T2* values were derived at rest and under adenosine stress. Quantitative coronary angiography served as the standard of reference and defined normal myocardial segments (i.e. all 16 segments in patients without any CAD), ischemic segments (i.e. supplied by a coronary artery with ≥50% luminal narrowing) and non-ischemic segments (i.e. supplied by a non-significantly stenosed coronary artery in patients with significant CAD). RESULTS: Coronary angiography demonstrated significant CAD in 23 patients. BOLD CMR at rest revealed significantly lower T2* values for ischemic segments (26.7 ± 11.6 ms) compared to normal (31.9 ± 11.9 ms; p < 0.0001) and non-ischemic segments (31.2 ± 12.2 ms; p = 0.0003). Under adenosine stress T2* values increased significantly in normal segments only (37.2 ± 14.7 ms; p < 0.0001). CONCLUSIONS: Rest and stress BOLD CMR at 3Tesla proved feasible and differentiated between ischemic, non-ischemic, and normal myocardial segments in a clinical patient population. BOLD CMR during vasodilator stress identified patients with significant CAD.
Manka et al. (Fri,) conducted a cross-sectional in Suspected or known coronary artery disease (n=46). BOLD cardiovascular magnetic resonance at 3.0 Tesla during adenosine stress vs. Rest BOLD CMR / Quantitative coronary angiography was evaluated on Area under the curve (AUC) for detecting significant CAD on a per patient basis (stress vs rest) (95% CI 0.67-0.92, p=0.015). Stress BOLD CMR at 3.0 Tesla accurately detected significant coronary artery disease with an AUC of 0.82, significantly outperforming rest imaging (AUC 0.61, p=0.015).