Clinical Value and Detection of Myocardial Bridge by Multi-slice Spiral CT Coronary Angiography
- VernacularTitle:多层螺旋CT冠状动脉血管成像时心肌桥的检出与临床价值
- Author:
Libo PANG
;
Liuquan CHEN
;
Xihai ZHAO
;
Haibo YAN
;
Peng XIN
- Publication Type:Journal Article
- Keywords:
heart;
coronary angiogarphy;
tomography ,X-ray computed;
myocardial bridge
- From:
Journal of Practical Radiology
2001;0(07):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the characteristic and clinical meaning of myocardial bridge in patients with multi-slice spiral CT(MSCT) coronary angiography.Methods 875 patients with suspected or diagnosed coronary artery disease were studied with MSCT coronary angiography,579 cases were male and 296 cases were female,ranged from 30~87 years old in age with average of 60 years old.The heart was scanned with retrospectively ECG-gated,reconstruction from phase for all original tomographic source images at 30%~40% R-R phase interval according to heart rate ≥75 bpm and at 40%~50% R-R phase interval according to heart rate ≤75 bpm.The images of maximum intensity projection,multiplanar reconstruction and vulume reconstruction were gained to show left and right main coronary artery and their main branchs on mulliple angle.Results The myocardial bridges were detected in 89 cases,the positive rate was 10.2%,36 cases(40.5%)had different grade stenosis(≤50%).The myocardial bridges located at middle segment of anterior descending artery(79.8%),the thickness of myocardial bridge was 0.06~0.55 cm,the atherosclerosis plaques were found in 20 cases,the vascular stenosis was approximate to 50%.39 cases with simple myocardial bridges had angina,21 cases hadn’t angina.23 cases with myocardial bridges accompanied by coronary artery atherosclerosis had angina.Conclusion MSCT coronary angiography may clearly detect the myocardial bridge,which can provide more worthy information for clinical diagnosis and treatment.
