Clampless off-pump versus conventional coronary artery revascularization: A propensity score analysis of 788 patients

Jochen Börgermann*, Kavous Hakim, André Renner, Amin Parsa, Anas Aboud, Tobias Becker, Marc Masshoff, Armin Zittermann, Jan Fritz Gummert, Oliver Kuss

*Corresponding author for this work
50 Citations (Scopus)


Background-This study aimed to assess if clampless off-pump coronary artery bypass grafting (CABG) decreases risk-adjusted mortality, stroke rate, and morbidity in unselected patients in comparison to conventional CABG. Methods and Results-Between July 2009 and November 2010, data of 1282 consecutive patients undergoing isolated CABG were prospectively recorded. In 30.8% (n=395), clampless off-pump revascularization was used, either with the PAS-Port automated central venous anastomosis system (n=310) or as total arterial revascularization without central anastomoses (n=85). Propensity score (PS) matching was performed based on 15 preoperative risk variables to correct for selection bias. In-hospital mortality and stroke rate as primary end point, as well as major complications and follow-up outcome of clampless off-pump (lessOPCAB) and conventional CABG (cCABG) were compared in 394 matched patient pairs (total: 788 patients). The clampless off-pump technique decreased the in-hospital rate of death (odds ratio, 0.25; 95% confidence interval, 0.05-1.18, P=0.080) and stroke (odds ratio, 0.36; 95% confidence interval, 0.13-0.99, P=0.048) significantly. Complications such as low cardiac output syndrome, prolonged ventilation and rethoracotomy were also reduced by lessOPCAB. Over a 2-year follow-up period overall survival, cerebrovascular and major adverse event rate were significantly lower in the lessOPCAB group, while the repeat revascularization rate was comparable. Conclusions-In a retrospective PS-matched analysis, clampless off-pump CABG lowers mortality, stroke rate and other morbidity in an unselected group of patients with coronary artery disease.

Original languageEnglish
Issue number11 SUPPL.1
Pages (from-to)S176-S182
Publication statusPublished - 11.09.2012


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