| Effect of graft adaptation of the internal mammary artery on longitudinal phasic blood flow velocity characteristics after surgery. | |
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MedLine Citation:
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PMID: 20922536 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Left internal mammary artery (LIMA) bypass conduits undergo gradual longitudinal flow transition from the proximal to distal segments, and the diastolic/systolic (D/S) ratios of the flow indices can diagnose graft patency. However, the influence of graft adaptation on this has not been studied. We examined 46 patients with LIMA graft to the left anterior descending artery using a Doppler-tipped guidewire in the proximal, middle, and distal segments; 34 had patent LIMAs (group A: new LIMAs; <1 month postoperatively; n = 22 and group B: old LIMAs; ≥1 month postoperatively; n = 12), and 12 had new LIMAs with distal stenosis (group C). In diastole, the time-averaged peak velocities, maximum peak velocities, and velocity-time integrals in each segment were significantly greater in group A than in groups B or C; however, in systole, they did not differ significantly among the three groups. The D/S ratios of the indices in all segments in group A were significantly greater than those in groups B or C; however, they did not differ between groups B and C in any of the segments. Graft adaptation of a patent LIMA, itself, affects the longitudinal flow transition pattern. The D/S ratio of the three indices in the patent old LIMAs did not differ from those in the LIMAs with distal stenosis early after surgery. The timing of LIMA flow assessment must be considered during assessment of the graft patency from the flow velocity patterns. |
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Authors:
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Setsuo Kumazaki; Jun Koyama; Kazunori Aizawa; Hiroki Kasai; Megumi Koshikawa; Atsushi Izawa; Takeshi Tomita; Masafumi Takahashi; Uichi Ikeda |
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Publication Detail:
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Type: Journal Article Date: 2010-10-05 |
Journal Detail:
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Title: Heart and vessels Volume: 25 ISSN: 1615-2573 ISO Abbreviation: Heart Vessels Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-08 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8511258 Medline TA: Heart Vessels Country: Japan |
Other Details:
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Languages: eng Pagination: 515-21 Citation Subset: IM |
Affiliation:
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Department of Cardiovascular Medicine, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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