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Comparison Between 2 Bilateral Internal Thoracic Artery Coronary Artery Bypass Grafting Configurations

This study has been completed.
Information provided by (Responsible Party):
Glineur, Cliniques universitaires Saint-Luc- Université Catholique de Louvain Identifier:
First received: August 1, 2012
Last updated: August 10, 2012
Last verified: August 2012

Bilateral internal thoracic arteries (BITA) demonstrated superiority over other grafts to the left coronary system in terms of patency and survival benefit. Several BITA configurations are proposed for left-sided myocardial revascularization, but the ideal BITA assemblage is still unidentified.

From 03/2003 to 08/2006, 1297 consecutive patients underwent isolated bypass surgery in our institution. 481 patients met the inclusion criteria for randomization and 304 (64%) were randomized. Patients were allocated to BITA in situ grafting (n=147) or Y configuration (n=152) then evaluated for clinical, functional, and angiographic outcome after 6 months, 3 and 7 years . Patient telephone interviews were conducted every 3 months and a stress test performed twice yearly under the referring cardiologist's supervision. Angiographic follow-up was performed 6 months after surgery. The primary and secondary end points were, respectively, major adverse cerebro-cardiovascular events (MACCE) and the proportion of ITA grafts that were completely occluded at follow-up angiography.

Condition Intervention Phase
Coronary Disease
Procedure: Coronary artery bypass grafting
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Comparison of Bilateral Internal Thoracic Artery Revascularization Using in Situ or Y Graft Configurations: a Prospective Randomized Clinical, Functional and Angiographic Evaluation

Resource links provided by NLM:

Further study details as provided by Cliniques universitaires Saint-Luc- Université Catholique de Louvain:

Primary Outcome Measures:
  • major adverse cerebro-cardiovascular events (MACCE) [ Time Frame: 3 years ]
    Data analysis The clinical end point was occurrence of MACCE defined as a combined end-point including: death from any cause; perioperative myocardial infarction (occurring between 0 and 30 days); late myocardial infarction (occurring between 31 days and 6 years); additional cardiac surgery; coronary angioplasty; and stroke. Myocardial infarction was defined as the apparition of a new Q wave, a rise of more than 10 ng / ml of troponin in the early post operative period or any episode of chest pain with typical rise and fall of cardiac enzymes thereafter.

Secondary Outcome Measures:
  • graft patency [ Time Frame: 3 years ]

    The angiographic end point was the proportion of ITA grafts that were completely occluded at follow-up angiography. Complete occlusion was defined as the absence of visible opacification of the target coronary vessel (TIMI flow grade 0).

    All postoperative angiograms were independently reviewed by 2 investigators; discrepancies in patency definition were reviewed by a third investigator and resolved by consensus.

Enrollment: 304
Study Start Date: February 2003
Study Completion Date: March 2012
Primary Completion Date: August 2006 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: In Situ Bilateral mammary grafting
Coronary artery bypass grafting: BITA in situ (LITA to the LAD and RITA to the marginal branches into the transverse sinus)
Procedure: Coronary artery bypass grafting
Active Comparator: Y composite Bilateral mammary grafting
Coronary artery bypass grafting: BITA Y (LITA to the LAD and RITA to the marginal branches but anastomozed proximally to the LITA in a Y configuration
Procedure: Coronary artery bypass grafting

  Show Detailed Description


Ages Eligible for Study:   18 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Angiographic evidence of severe (>70% by visual estimate) 3 vessels coronary obstruction
  • Elective procedure
  • Isolated CABG
  • Age <75 years and life expectancy >5 years

Exclusion Criteria:

  • Diabetes with a HbA1c >7.5
  • FEV1 < 60 % predicted value
  • Body mass index >35
  • Reoperation
  • Other configuration then LIMA -> LAD territory. RIMA -> LCX territory.
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Please refer to this study by its identifier: NCT01666366

Cliniques Universitaire St Luc
Brussels, Belgium, 1200
Sponsors and Collaborators
Cliniques universitaires Saint-Luc- Université Catholique de Louvain
Principal Investigator: David Glineur, MD PhD Cliniques Universitaire St Luc
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Glineur, Professor David Glineur MD PhD, Cliniques universitaires Saint-Luc- Université Catholique de Louvain Identifier: NCT01666366     History of Changes
Other Study ID Numbers: BITA Y vs In Situ
Study First Received: August 1, 2012
Last Updated: August 10, 2012

Additional relevant MeSH terms:
Coronary Disease
Coronary Artery Disease
Myocardial Ischemia
Heart Diseases
Cardiovascular Diseases
Vascular Diseases
Arterial Occlusive Diseases processed this record on April 25, 2017