OBJECTIVES: To evaluate the diagnostic accuracy of dual-source CT (DSCT) prospective ECG-triggering coronary angiography in patients with different heart rate (HR).
METHODS: 103 patients with suspected coronary artery disease underwent DSCT prospective ECG-triggered coronary angiography and invasive coronary angiography (ICA). The patients were grouped by HR during CT scans: low HR (â‰¤60 bpm, nâ€‰=â€‰34); medium HR (60â€‰<â€‰HRâ€‰â‰¤â€‰70 bpm, nâ€‰=â€‰36) and high HR (>70 bpm, nâ€‰=â€‰33). The sensitivity and specificity of DSCT in detecting â‰¥50% stenosis were compared among subgroups where ICA was the gold standard. Image quality was scored using a 4-point scale.
RESULTS: A total of 1,580 (95.9%) coronary artery segments were evaluable. Sensitivity and specificity were 82.8% and 98.4%, 88.3% and 98.7%, and 80.3% and 98.6% for different subgroups (all pâ€‰>â€‰0.05). The overall area under the curve of the receiver-operating characteristic analysis was 0.94. The image quality scores were 3.1â€‰Â±â€‰0.3, 3.1â€‰Â±â€‰0.3 and 3.0â€‰Â±â€‰0.4 for subgroups (pâ€‰>â€‰0.05). The overall average effective radiation dose was 3.60â€‰Â±â€‰1.60 mSv.
CONCLUSIONS: DSCT coronary angiography with prospective ECG-triggering could be just as accurate in patients with medium to high HR compared to those with low HR. Cody Latimer Authentic Jersey