Published in:
01-12-2007 | Original Paper
Myocardial viability by contrast-enhanced cardiovascular magnetic resonance in patients with coronary artery disease: comparison with gated single-photon emission tomography and FDG position emission tomography
Authors:
Yen-Wen Wu, Eiji Tadamura, Shotaro Kanao, Masaki Yamamuro, Akira Marui, Masashi Komeda, Masanao Toma, Takeshi Kimura, Kaori Togashi
Published in:
The International Journal of Cardiovascular Imaging
|
Issue 6/2007
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Abstract
Background
The aim of this study was to assess the value of contrast-enhanced cardiovascular magnetic resonance (CMR) in viability for patients with coronary artery disease and left ventricular (LV) dysfunction (ejection fraction [EF] ≤50%), comparing to gated thallium-201 (201Tl) single photon emission computed tomography (SPECT) and 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET).
Methods and Results
One hundred sixteen patients (EF 37.8 ± 16.2%) underwent stress-reinjection or rest-redistribution gated-SPECT and CMR (46 FDG-PET) within 1 month. All images were analyzed in a 17-segment and 0–4 scales system. Of 1972 segments, delayed enhancement (DE) on CMR correlated well with 201Tl reduction (r = 0.90, p < 0.0001). The agreement of SPECT (≥50% maximal 201Tl activity) and CMR (≤50% DE) was 96.8% (κ = 0.62). CMR detected more subendocardial scars in 18 subjects (60 segments). Reduced 201Tl activity but none DE were observed in 19 subjects (76 segments; more inferior) who had lower EF and larger end-systolic volume (p < 0.05). Of 411 dysfunctional segments from 46 patients, FDG-PET (≥50% of maximal FDG uptake) detected more viability (9%).
Conclusion
The extent of DE correlated 201Tl activity well. CMR could detect more small infarcts, while FDG-PET could detect more viability. CMR could distinguish between artifacts or infarction on SPECT, especially in poor LV function.