|
| Evaluation of the Internal Mammary Artery Graft: Usefulness of Transcutaneous Doppler Sonography |
|
| Hwan Jun Jae M.D.*, Young Hwan Koh, M.D.,* Hyung Beom Kim, M.D.*, Ki Bong Kim, M.D.*, Jin Wook Chung, M.D.*,***, Jae Hyung Park, M.D.*,*** |
|
| Departments of Radiology*, Department of Thoracic Surgery**, the Heart Institute*** Seoul National University College of Medicine |
|
| PURPOSE : The purpose of this study is to evaluate the usefulness of transcutaneous doppler sonography for assessment
of internal mammary artery graft patency after coronary bypass graft.
MATERIALS and METHODS : Doppler sonography of internal mammary artery was performed in 23 patients, who underwent
postoperative cardiac catheterization studies. Doppler signals from the proximal part of the internal
mammary artery graft were studied from the supraclavicular fossa in the left internal mammary artery and from
the high intercostal space in the right internal mammary artery. According to the coronary angiographic studies,
internal mammary artery grafts were divided into two groups: Group A with significant stenosis (>75% stenosis)
of the internal mammary artery, and Group B with no significant stenosis of the internal mammary artery.
The diastolic/systolic peak velocity ration and diastolic/systolic flow-volume ratio between the two groups were
analyzed.
RESULTS : Doppler spectrum of the internal mammary artery were obtained from 21 patients, but not from 2 patients,
because of the poor sonic window. According to the coronary angiographic studies, there were 6 cases in
Group A and 16 cases in Group B. The diastolic/systolic peak velocity ration and diastolic/systolic flow-volume
ration in Group A were significantly smaller than in group B(p<0.05). A diastolic/systolic peak velocity ratio
<0.4 predicted significant internal mammary artery graft stenosis(>75% stenosis) with a sensitivity and specificity
of 100% and 75% respectively. A diastolic/systolic flow-volume ratio <0.45 predicted significant internal
mammary artery graft stenosis (>75% stenosis) with a sensitivity and specificity of 83% and 88% respectively.
CONCLUSION : Transcutaneous doppler sonography is useful for non-invasive assessment of the internal mammary
artery graft patency. |
|
| Keyword : Arteries, grafts and prostheses Arteries, stenosis or obstruction Arteries, US Coronary vessels, diseases US, Doppler studies |
|
pdf파일 : 51제환준9.pdf 
|
|
> Journal > Journal Search 
Journal of Korean Society of Ultrasound in Medicine 2000 ; 19 (1) : p.51-56
