ECG-gated CT Angiography for the Assessment of Coronary bypass Graft Patency: the Influence of Heart Rate, Type of bypass Graft, Target Vessel and Surgical Technique on the Diagnostic Accuracy
Journal of the Korean Radiological Society
;
: 11-17, 2006.
Article
in Korean
| WPRIM
| ID: wpr-92690
ABSTRACT
PURPOSE:
We wanted to evaluate the accuracy of using ECG-gated CT angiography (CTA) for the assessment of coronary bypass graft patency. MATERIALS ANDMETHODS:
This study included 48 patients who underwent both CTA and conventional angiography to evaluate coronary bypass graft patency. CTA was performed with a 16-detector row multislice CT scanner. We calculated the sensitivity and specificity of CTA to detect occlusion of bypass graft that was equal to or greater than 50% of the expected diameter. Conventional angiography served as a gold standard. A total 160 grafts were evaluated. The diagnostic accuracy was evaluated according to a variety of factors (heart rate, types of bypass graft, target vessel, and surgical techniques).RESULTS:
The overall sensitivity, specificity and accuracy of CTA were 83.9%, 95.4% and 93.1%, respectively. There was no significant statistical difference for each factor according to Fisher's exact test. Although the grafts anastomosed to the left circumflex arterial branches and a high heart rate showed a statistically significant high risk of misdiagnosis on the simple logistic regression test, a high heart rate was the only significant factor on the multiple logistic regression test (odds, 5.9).CONCLUSION:
CTA provides for good noninvasive evaluation of the coronary bypass graft patency. The heart rate and the anastomosed vessel are factors that can influence the accuracy.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Angiography
/
Logistic Models
/
Sensitivity and Specificity
/
Transplants
/
Diagnostic Errors
/
Heart
/
Heart Rate
Type of study:
Controlled clinical trial
/
Diagnostic study
/
Risk factors
Limits:
Humans
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
2006
Type:
Article
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