Thorac Cardiovasc Surg 2016; 64 - OP216
DOI: 10.1055/s-0036-1571646

Midterm Outcome after Anaortic and Clampless Off-pump and Conventional Coronary Artery Bypass Grafting - Analysis of 5,422 Unselected Patients

J. Börgermann 1, K. Preindl 1, A. Renner 1, A. Aboud 1, K. Hakim 1, M. Benzinger 1, T. Pühler 1, S. Ensminger 1, T. Becker 1, A. Zittermann 1, O. Kuss 2, J. F. Gummert 1
  • 1Heart and Diabetes Center NRW Ruhr University of Bochum, Clinic for Thoracic and Cardiovascular Surgery, Bad Oeynhausen, Germany
  • 2Leibniz Institute for Diabetes Research at Heinrich Heine University Düsseldorf, Inst. for Biometry and Epidemiology, Düsseldorf, Germany

Background: Metaanalyses from observational studies and randomized studies have been able to demonstrate benefits of off-pump surgery for hard endpoints and surrogate endpoints. In some of these investigations, however, an increased re-revascularization rate was noted in the off-pump groups, which in turn could impact the long-term survival of these patients. Against this background we analyzed the course of all patients undergoing isolated coronary surgery according to the major adverse cardiac and cerebrovascular event (MACCE) criteria.

Methods: A prospective register was taken from a single high-volume off-pump center recording all anaortic off-pump (ANA; n = 1,233), clampless off-pump (PasPort; n = 2,310) and conventional (CONV; n = 1,879) coronary artery bypass operations during the period from 07/2009 to 06/2015. Propensity Score Matching was performed based on 28 preoperative risk factors, including the EuroSCORE II and German CABG Score (KCH), to correct for selection bias between the three groups.

Results: We were able to find 937 triplets (n = 2,811) ANA versus PasPort versus CONV. Compared with the conventional group, the in-hospital mortality of the ANA group was significantly better (OR for ANA [95%-CI] 0.23 [0.05; 0.75], p = 0.01), and that of the PasPort group better, with a clearly noticeable trend (OR for PasPort [95%-CI] 0.46 [0.16; 1.20], p = 0.12).

In the mid-term course (median 849 days) there were no longer any significant differences for mortality (HR for ANA [95%-CI] 0.68 [0.48; 1.03], p = 0.07; HR for PasPort [95%-CI] 0.83 [0.55; 1.25], p = 0.38; reference: CONV), stroke (HR for ANA [95%-CI] 1.00 [0.54; 1.86], p = 0.99; HR for PasPort [95%-CI] 1.06 [0.56; 2.01], p = 0.86), myocardial infarction (HR for ANA [95%-CI] 0.50 [0.20; 1.28], p = 0.15; HR for PasPort [95%-CI] 0.67 [0.29; 1.53], p = 0.34) or re-revascularization (HR for ANA [95%-CI] 0.78 [0.53; 1.14], p = 0.19; HR for PasPort [95%-CI] 0.86 [0.61; 1.29], p = 0.53).

Conclusions: These data show in the mid-term course no difference with regard to the major cardiac and cerebrovascular events (MACCE) between anaortic off-pump, clampless off-pump using the PasPort device and conventional coronary artery bypass grafting.