title: [Spiral CT and CT angiography after coronary bypass surgery].
abstract: OBJECTIVE
  Evaluation of spiral-CT and CT-angiography for imaging of venous and arterial coronary bypass grafts during the early postoperative period.
  
  
  METHODS
  In 198 patients suffering from coronary heart disease, 583 aortocoronary venous grafts (ACVG), 70 arterial grafts and 24 jumped grafts were investigated 9-15 days following coronary surgery. In 57 patients the results were compared to arterial DSA and reconstructive CT-angiography.
  
  
  RESULTS
  At arterial DSA 93% of ACVG and 100% of arterial grafts were patent. Spiral-CT demonstrated 104 of 105 ACVG (99%) and 20 of 29 arterial grafts (69%) correct patent. All occluded ACVG (n = 8) were detected. 90% of ACVG but only 32% of arterial grafts were visualised completely over long segments. Imaging of jumped grafts was insufficient. In CT-angiography artificial vessel stenoses impaired correct visualisation of graft morphology.
  
  
  CONCLUSIONS
  Spiral-CT allows sufficient differentiation of patent and obstructed ACVG during the early postoperative period. Diagnostic of arterial grafts is of lower accuracy. For CT angiography of venous and arterial coronary grafts further improvements are necessary.
authors.affiliation: Abteilung für Radiologische Diagnostik, Universität Tübingon.
authors.forename: P E
authors.initials: PE
authors.lastname: Huppert
authors.forename: S
authors.initials: S
authors.lastname: Salehi-Gilani
authors.forename: S H
authors.initials: SH
authors.lastname: Duda
authors.forename: H
authors.initials: H
authors.lastname: Seboldt
authors.forename: C D
authors.initials: CD
authors.lastname: Claussen
mesh_terms: D000792:Angiography / Q000379:methods*; D015901:Angiography, Digital Subtraction; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging; D001027:Aortography; D001158:Arteries / Q000637:transplantation; D001026:Coronary Artery Bypass / Q000379:methods; D005069:Evaluation Studies as Topic; D006801:Humans; D011184:Postoperative Period; D012680:Sensitivity and Specificity; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014680:Veins / Q000637:transplantation
vernacular_title: Spiral-CT und CT-Angiographie nach koronarer Bypassoperation.