Umberto Benedetto1, Massimo Caputo2, Nishith N Patel3, Francesca Fiorentino4, Alan Bryan5, Gianni D Angelini6. 1. Bristol Heart Institute, University of Bristol, School of Clinical Sciences, Bristol, United Kingdom. Electronic address: Umberto.benedetto@bristol.ac.uk. 2. Bristol Heart Institute, University of Bristol, School of Clinical Sciences, Bristol, United Kingdom. Electronic address: Massimo.caputo@bristol.ac.uk. 3. Academic Cardiac Surgery Group, National Heart & Lung Institute, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, United Kingdom. Electronic address: nishith.patel@imperial.ac.uk. 4. Academic Cardiac Surgery Group, National Heart & Lung Institute, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, United Kingdom. Electronic address: f.fiorentino@imperial.ac.uk. 5. Bristol Heart Institute, University of Bristol, School of Clinical Sciences, Bristol, United Kingdom. Electronic address: alanbryan46@aol.com. 6. Bristol Heart Institute, University of Bristol, School of Clinical Sciences, Bristol, United Kingdom. Electronic address: g.d.angelini@bristol.ac.uk.
Abstract
BACKGROUND: We sought to compare the incidence of incomplete revascularization (IR) and long-term survival (up to 20years) after off-pump (OPCAB) versus on-pump (ONCAB) coronary artery bypass in a high OPCAB volume centre where OPCAB was introduced in 1996 and has become the preferred strategy over the years. METHODS AND RESULTS: From 1996 to 2015 a total of 7,427 OPCAB and 7128 ONCAB procedures were performed at Bristol Heart Institute, United Kingdom. We obtained 5423 propensity matched pairs for final comparison. Mixed effect Cox model accounting for clustering due to different surgeon was used to investigate the treatment effect on mortality. RESULTS: OPCAB was associated with higher rate of incomplete revascularization 13.3% versus 6.7%; P<0.0001). Mean follow-up time was 7.8±4.6year [max 17.3]. At 12years OPCAB was associated with a marginal but significant +3% increase in overall mortality (67.4%[95%CI 65.8-69.1] vs 64.4%[95%CI 62.7-66.2]; stratified log-rank P=0.03). When compared to ONCAB with complete revascularization, OPCAB with IR (HR 1.74;95%CI 1.53-1.99; P<0.001) and ONCAB with IR (HR 1.29; 95%CI 1.06-1.57; P=0.01) but not OPCAB with complete revascularization (HR 1.02;95%CI 0.94-1.11; P=0.63) were associated with increased risk of late mortality. CONCLUSION: Despite completeness of revascularization was achieved in the majority of OPCAB cases, OPCAB remained associated with a significantly higher rate of incomplete revascularization. This translated into a marginal but significant reduction in late survival rates after OPCAB when compared to ONCAB.
BACKGROUND: We sought to compare the incidence of incomplete revascularization (IR) and long-term survival (up to 20years) after off-pump (OPCAB) versus on-pump (ONCAB) coronary artery bypass in a high OPCAB volume centre where OPCAB was introduced in 1996 and has become the preferred strategy over the years. METHODS AND RESULTS: From 1996 to 2015 a total of 7,427 OPCAB and 7128 ONCAB procedures were performed at Bristol Heart Institute, United Kingdom. We obtained 5423 propensity matched pairs for final comparison. Mixed effect Cox model accounting for clustering due to different surgeon was used to investigate the treatment effect on mortality. RESULTS: OPCAB was associated with higher rate of incomplete revascularization 13.3% versus 6.7%; P<0.0001). Mean follow-up time was 7.8±4.6year [max 17.3]. At 12years OPCAB was associated with a marginal but significant +3% increase in overall mortality (67.4%[95%CI 65.8-69.1] vs 64.4%[95%CI 62.7-66.2]; stratified log-rank P=0.03). When compared to ONCAB with complete revascularization, OPCAB with IR (HR 1.74;95%CI 1.53-1.99; P<0.001) and ONCAB with IR (HR 1.29; 95%CI 1.06-1.57; P=0.01) but not OPCAB with complete revascularization (HR 1.02;95%CI 0.94-1.11; P=0.63) were associated with increased risk of late mortality. CONCLUSION: Despite completeness of revascularization was achieved in the majority of OPCAB cases, OPCAB remained associated with a significantly higher rate of incomplete revascularization. This translated into a marginal but significant reduction in late survival rates after OPCAB when compared to ONCAB.
Authors: Mario Gaudino; Gianni D Angelini; Charalambos Antoniades; Faisal Bakaeen; Umberto Benedetto; Antonio M Calafiore; Antonino Di Franco; Michele Di Mauro; Stephen E Fremes; Leonard N Girardi; David Glineur; Juan Grau; Guo-Wei He; Carlo Patrono; John D Puskas; Marc Ruel; Thomas A Schwann; Derrick Y Tam; James Tatoulis; Robert Tranbaugh; Michael Vallely; Marco A Zenati; Michael Mack; David P Taggart Journal: J Am Heart Assoc Date: 2018-08-21 Impact factor: 5.501