Baseline heart rate-adjusted electrocardiographic triggering for coronary artery electron-beam CT angiography.
Conventional electrocardiographic (ECG) triggering (group 1, 53 patients) was compared with baseline heart rate-adjusted ECG triggering (group 2, 54 patients) for coronary artery electron-beam computed tomographic (CT) angiography. CT angiographic data sets were compared blindly with conventional angiograms according to segment. Nonassessability of coronary artery segments was reduced from 35% in group 1 to 13% in group 2 (P < .001). More motion-free coronary artery images were obtained in group 2 than in group 1, especially in the right coronary artery (95% vs 67%, P < .001). Overall sensitivity and specificity for luminal stenosis (> or =50%) were 69% and 82% (group 1) and 76% and 92% (group 2) (P > .05 and P < .001, respectively). Baseline heart rate-adjusted ECG triggering improves image quality at coronary artery CT angiography for detection of coronary artery disease.
Department of Radiology, Cardiovascular Institute and FuWai Hospital, Peking Union Medical College, and Chinese Academy of Medical Sciences, 167 Bei-Li-Shi St, Beijing 100037, China. blu@vip.sina.com
Bin
B
Lu
Nan
N
Zhuang
Song-Shou
SS
Mao
Janis
J
Child
Sivi
S
Carson
Matthew J
MJ
Budoff
D000328:Adult; D000368:Aged; D017023:Coronary Angiography / Q000379:methods*; D003327:Coronary Disease / Q000000981:diagnostic imaging; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*