Abstract
With improving MR sequence, phase-array coil and image quality, cardiac magnetic resonance imaging is becoming a promising method for a comprehensive non-invasive evaluation of coronary artery and myocardial viability. The study aimed to evaluate contrast-enhanced whole-heart coronary MR angiography (CE WH-CMRA) at 3.0-Tesla for the diagnosis of significant stenosis (≥50 %) and detection of myocardial infarction (MI) in patients with suspected coronary artery disease (CAD). CE WH-CMRA was performed in consecutive 70 patients with suspected CAD by using a 3.0-T MR system. A respiratory-gated, electrocardiography-triggered, inversion-recovery, segmented fast low angle shot sequence (TI = 200 ms) was used. Data acquisition began 60 s after the slow injection of Gd-BOPTA (0.2 mmol/kg body weight, at an injection rate 0.3 ml/s). At last, breath-hold 2D-PSIR-SSFP sequence was performed. Diagnostic accuracy of CE WH-CMRA in detecting significant stenosis (≥50 %) was evaluated using invasive coronary angiography as the referenced standard. The MI region appearing as high signal intensity visualized on CEWH-CMRA and 2D-PSIR-SSFP images were compared and analyzed. CE WH-CMRA correctly identified 42 of 44 patients with significant CAD. The overall sensitivity, specificity, negative predictive value, positive predictive value and accuracy for diagnosing significant CAD was 83.6, 95.8, 96.0, 82.8 and 93.4 % respectively. The MI region detected by WH-CMRA and 2D-PSIR-SSFP were consistent in 10 patients and these segments manifested with transmural or subendocardial enhancement patterns. Only one MI patient was judged inconsistent between WH-CMRA and 2D-PSIR-SSFP, who was confirmed by clinical and electrocardiogram results. The enhancement pattern in this patient was spotted and focal in 2D-PSIR-SSFP, but was dismissed by WH-CMRA. It is feasible to obtain information about coronary artery stenosis and myocardial viability in a single CE WH-CMRA with administration of Gd-BOPTA.
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Abbreviations
- CE WH-CMRA:
-
Contrast-enhanced whole heart cardiac magnetic angiography
- CAD:
-
Coronary artery disease
- FLASH:
-
Fast low angle shot
- PSIR:
-
Phase-sensitive inversion recovery
- SSFP:
-
Steady-state free procession
- DE:
-
Delayed enhancement
- MI:
-
Myocardial infarction
- ECG:
-
Electrocardiogram
- HASTE:
-
Half-Fourier single shot turbo spin echo
- GRAPPA:
-
Generalized autocalibrating partially parallel acquisition
- ICA:
-
Invasive coronary angiography
- MIP:
-
Maximum intensity projection
- MPR:
-
Multiplanar reformation
- QCA:
-
Quantitative coronary angiography
- LAD:
-
Left anterior descending artery
- LCx:
-
Left circumflex artery
- RCA:
-
Right coronary artery
- PL:
-
Posterolateral branch
- PDA:
-
Posterior descending artery
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Acknowledgments
This study was supported by a grant from the National Natural Science Foundation of China (No. 81201070) and Fudan University Foundation for young teachers for the improvement of scientific research ability (Contract Grant Number: 20520133486).
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Ethical standard
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008 (5). Informed consent was obtained from all patients for being included in the study.
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Yun, H., Jin, H., Yang, S. et al. Coronary artery angiography and myocardial viability imaging: a 3.0-T contrast-enhanced magnetic resonance coronary artery angiography with Gd-BOPTA. Int J Cardiovasc Imaging 30, 99–108 (2014). https://doi.org/10.1007/s10554-013-0297-4
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DOI: https://doi.org/10.1007/s10554-013-0297-4