Document Detail

Evaluation of the flow characteristics of an internal thoracic artery graft after coronary artery bypass grafting by intercostal Duplex scanning ultrasonography.
MedLine Citation:
PMID:  17989635     Owner:  NLM     Status:  MEDLINE    
AIM: We previously reported intercostal duplex scanning ultrasonography to be a reliable technique for the evaluation of the internal thoracic artery (ITA). The purpose of this study was to determine the flow characteristics of the ITA graft using this technique. METHODS: We evaluated the flow characteristics of 69 ITA grafts who underwent coronary artery bypass grafting by this technique. The internal diameter, mean systolic and diastolic velocity, total flow volume and diastolic fraction were all thus obtained. RESULTS: One occluded graft was found during the follow-up. The mean systolic velocity significantly decreased after the operation (P=0.0001) and the mean diastolic velocity significantly increased both just after the operation (P=0.0002) and 1 year later (P=0.0283). The average diameter of the ITA graft after the operation (1.70+/-0.39), at 1 year (1.73+/-0.29) and at 2 years thereafter (1.66+/-0.27 mm) all significantly decreased in comparison to the preoperative value (2.30+/-0.35 mm) (P=0.0001). The average total flow volume after the operation (35.8+/-22.2), and at 1 year (29.4+/-16.5) and 2 years thereafter (23.4+/-12.7), respectively, were significantly decreased in comparison to the preoperative value (59.4+/-28.6 mL/min) (P=0.0001). However, the average diastolic fraction which was 25.1+/-10.5% before the operation significantly increased after the operation (54.5+/-12.0, 53.2+/-11.2 at 1 year and 50.4+/-9.3 at 2 years) (P=0.0001). CONCLUSION: This technique is thus considered to be a useful noninvasive for the postoperative follow-up of the graft function. A significant increase in the diastolic fraction is thought to be important for maintaining long term graft patency.
T Kadohama; N Ohtani; T Sasajima
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Journal of cardiovascular surgery     Volume:  48     ISSN:  0021-9509     ISO Abbreviation:  J Cardiovasc Surg (Torino)     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-11-08     Completed Date:  2007-12-19     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0066127     Medline TA:  J Cardiovasc Surg (Torino)     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  647-51     Citation Subset:  IM    
Department of Cardiovascular Surgery, Shin-Nittetsu Muroran General Hospital, Muroran, Japan.
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MeSH Terms
Aged, 80 and over
Blood Flow Velocity
Follow-Up Studies
Internal Mammary-Coronary Artery Anastomosis*
Mammary Arteries / physiopathology,  transplantation,  ultrasonography*
Middle Aged
Retrospective Studies
Time Factors
Treatment Outcome
Ultrasonography, Doppler, Pulsed*
Vascular Patency*

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