Analyzed literature data concerning late outcomes of CABG with intra-aortic balloon pump (IABP) support in high-risk patients with acute coronary syndrome. MEDLINE, EMBASE, Scopus, The Benchmark Counterpulsation Outcomes Registry, Cochrane registry of Controlled Trials, and reference lists of relevant articles were searched. Results of surgery were matched with: 1).suitable option and time of surgery; 2).initial risk profile of patients; 3).tactic strategy, and timing of IABP connection; 4).leading risk predictors of in-hospital, and late results of surgery.