title: How to guide stent-graft implantation in type B aortic dissection? Comparison of angiography, transesophageal echocardiography, and intravascular ultrasound.
abstract: BACKGROUND
  Despite growing interest in stent-graft implantation for type-B aortic dissection, there are no established recommendations to prepare and perform an implantation procedure.
  
  
  RESULTS
  We directly compared angiography (ANGIO), transesophageal echocardiography (TEE), and intravascular ultrasound (IVUS) intraprocedually before and after placement of 48 stent grafts in 42 consecutive patients (12 women, 61+/-11 years of age) with acute and chronic type-B aortic dissection for both usefulness and capability to guide aortic stent-graft implantation. Both IVUS and TEE are superior to ANGIO to identify multiple entries (52 and 43 versus 34; P<0.005 each), to diagnose false-lumen slow flow after stent-graft implantation (32 and 31 versus 24; P<0.005 each) and to detect incomplete stent apposition (18 and 16 versus 8; P<0.005 each). In comparison with ANGIO, guide wire position over the entire length of the aorta was documented more frequently by TEE and IVUS (40 and 42 versus 25; P<0.001 each). In 4 patients with abdominal extension of the dissection, only IVUS was able to accurately identify the false lumen over the entire length of the diseased aorta. TEE was superior to IVUS and ANGIO in the detection of endoleaks (5 versus 0 and 1; P<0.05 each). Intraprocedural ANGIO, TEE, and IVUS had been performed without complications in all patients.
  
  
  CONCLUSIONS
  TEE in conjunction with ANGIO appears to be advantageous and adds incremental information to safely guide stent-graft placement in type-B aortic dissection. Additional use of IVUS was found to be helpful in patients with complex anatomy and abdominal extension of the dissection.
authors.affiliation: Department of Cardiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany. koschyk@uke.uni-hamburg.de
authors.forename: Dietmar H
authors.initials: DH
authors.lastname: Koschyk
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Nienaber
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Knap
authors.forename: Thomas
authors.initials: T
authors.lastname: Hofmann
authors.forename: Yskert V
authors.initials: YV
authors.lastname: Kodolitsch
authors.forename: Valeria
authors.initials: V
authors.lastname: Skriabina
authors.forename: Mohammed
authors.initials: M
authors.lastname: Ismail
authors.forename: Olaf
authors.initials: O
authors.lastname: Franzen
authors.forename: Tim C
authors.initials: TC
authors.lastname: Rehders
authors.forename: Christoph
authors.initials: C
authors.lastname: Dieckmann
authors.forename: Gunnar
authors.initials: G
authors.lastname: Lund
authors.forename: Hermann
authors.initials: H
authors.lastname: Reichenspurner
authors.forename: Thomas
authors.initials: T
authors.lastname: Meinertz
mesh_terms: D000368:Aged; D000784:Aortic Dissection / Q000145:classification / Q000000981:diagnostic imaging / Q000601:surgery*; D001014:Aortic Aneurysm / Q000145:classification / Q000000981:diagnostic imaging / Q000601:surgery*; D017544:Aortic Aneurysm, Abdominal / Q000145:classification / Q000000981:diagnostic imaging / Q000601:surgery; D017545:Aortic Aneurysm, Thoracic / Q000145:classification / Q000000981:diagnostic imaging / Q000601:surgery; D001027:Aortography; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000379:methods*; D006328:Cardiac Catheterization; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011093:Polyethylene Terephthalates; D015641:Radiography, Interventional; D012189:Retrospective Studies; D015607:Stents; D018084:Ultrasonography, Interventional
chemical_list: D011093:Polyethylene Terephthalates