Joshua M Rosenblum1, Ralf E Harskamp2, Niels Hoedemaker3, Patrick Walker1, Henry A Liberman1, Robert J de Winter3, Thomas A Vassiliades4, John D Puskas5, Michael E Halkos6. 1. Divisions of Cardiothoracic Surgery and Cardiology, Clinical Research Unit, Emory University School of Medicine, Atlanta Ga. 2. Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands. 3. Academic Medical Center, University of Amsterdam, The Netherlands. 4. Medtronic Inc, Mounds View, Minn. 5. Department of Cardiothoracic Surgery, Mount Sinai Beth Israel, New York, NY. 6. Divisions of Cardiothoracic Surgery and Cardiology, Clinical Research Unit, Emory University School of Medicine, Atlanta Ga. Electronic address: mhalkos@emory.edu.
Abstract
OBJECTIVE: Hybrid coronary revascularization (HCR) combines minimally invasive left internal mammary artery (LIMA)-left anterior descending artery (LAD) bypass with percutaneous intervention of non-LAD vessels. The purpose of this study was to compare outcomes of HCR to conventional coronary artery bypass graft (CABG) surgery with single internal mammary artery (SIMA) or bilateral internal mammary artery (BIMA) grafting. METHODS: Between October 2003 and September 2013, 306 consecutive patients who underwent HCR were compared with 8254 patients who underwent CABG with SIMA (7381; 89.4%) or BIMA (873; 10.6%) at a US academic center. The primary outcome was a composite of 30-day death, myocardial infarction, and stroke (major cerebrovascular and cardiac event [MACCE]). In addition to multiple logistic and linear regression analysis, a propensity score-matched analysis was used to compare HCR with SIMA and with BIMA. RESULTS: The Society of Thoracic Surgeons-predicted risk of mortality was 1.6% for HCR, 2.1% for SIMA, and 1.1% for BIMA (P < .001). Factors associated with HCR use were older age, lower body mass index, history of percutaneous coronary intervention, and 2-vessel disease. In propensity-matched groups, 30-day MACCE rates were comparable (3.3% for HCR vs 1.3% for BIMA [odds ratio (OR), 2.50; P = .12] and vs 3.6% for SIMA [OR, 1.00; P = 1.00]). In-hospital complications were lower after HCR versus SIMA or BIMA (OR, 0.59; P = .033 and OR, 0.55; P = .015, respectively), as was the need for blood transfusion (OR, 0.44; P < .001 and OR, 0.57; P < .001). HCR was associated with shorter hospital stay compared with SIMA (OR, 1.28; P = .038) or BIMA (OR, 1.40; P = .006). No survival difference between matched groups was found at midterm follow-up (HCR vs SIMA: hazard ratio [HR], 0.66; 95% confidence interval [CI], 0.32-1.38; P = .66; HCR vs BIMA: HR, 1.05; 95% CI, 0.48-2.29; P = .91). CONCLUSIONS: HCR may represent a safe, less invasive alternative to conventional CABG in carefully selected patients, with similar short-term and midterm outcomes as CABG performed with either SIMA or BIMA grafting.
OBJECTIVE: Hybrid coronary revascularization (HCR) combines minimally invasive left internal mammary artery (LIMA)-left anterior descending artery (LAD) bypass with percutaneous intervention of non-LAD vessels. The purpose of this study was to compare outcomes of HCR to conventional coronary artery bypass graft (CABG) surgery with single internal mammary artery (SIMA) or bilateral internal mammary artery (BIMA) grafting. METHODS: Between October 2003 and September 2013, 306 consecutive patients who underwent HCR were compared with 8254 patients who underwent CABG with SIMA (7381; 89.4%) or BIMA (873; 10.6%) at a US academic center. The primary outcome was a composite of 30-day death, myocardial infarction, and stroke (major cerebrovascular and cardiac event [MACCE]). In addition to multiple logistic and linear regression analysis, a propensity score-matched analysis was used to compare HCR with SIMA and with BIMA. RESULTS: The Society of Thoracic Surgeons-predicted risk of mortality was 1.6% for HCR, 2.1% for SIMA, and 1.1% for BIMA (P < .001). Factors associated with HCR use were older age, lower body mass index, history of percutaneous coronary intervention, and 2-vessel disease. In propensity-matched groups, 30-day MACCE rates were comparable (3.3% for HCR vs 1.3% for BIMA [odds ratio (OR), 2.50; P = .12] and vs 3.6% for SIMA [OR, 1.00; P = 1.00]). In-hospital complications were lower after HCR versus SIMA or BIMA (OR, 0.59; P = .033 and OR, 0.55; P = .015, respectively), as was the need for blood transfusion (OR, 0.44; P < .001 and OR, 0.57; P < .001). HCR was associated with shorter hospital stay compared with SIMA (OR, 1.28; P = .038) or BIMA (OR, 1.40; P = .006). No survival difference between matched groups was found at midterm follow-up (HCR vs SIMA: hazard ratio [HR], 0.66; 95% confidence interval [CI], 0.32-1.38; P = .66; HCR vs BIMA: HR, 1.05; 95% CI, 0.48-2.29; P = .91). CONCLUSIONS: HCR may represent a safe, less invasive alternative to conventional CABG in carefully selected patients, with similar short-term and midterm outcomes as CABG performed with either SIMA or BIMA grafting.
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