Clinical Factors That May Influence the Choice of Revascularization 5.9.1. Completeness of Revascularization Most patients undergoing CABG receive complete or nearly complete revascularization, which seems to influence long- term prognosis positively.1099 In contrast, complete revascu- larization is accomplished less often in subjects receiving PCI (eg, in ,70% of patients), and the extent to which the absence of complete initial revascularization influences outcome is less clear. Rates of late survival and survival free of MI appear to be similar in patients with and without complete revascularization after PCI. Nevertheless, the need for subse- quent CABG is usually higher in those whose initial revas- cularization procedure was incomplete (compared with those with complete revascularization) after PCI.1100 1102 5.9.2. LV Systolic Dysfunction Several older studies and a meta-analysis of the data from these studies reported that patients with LV systolic dysfunc- tion (predominantly mild to moderate in severity) had better survival with CABG than with medical therapy alone.365,412,999 1002 For patients with more severe LV systolic dysfunction, however, the evidence that CABG results in better survival compared with medical therapy is lacking. In the STICH trial of subjects with LVEF ,35% with or without viability testing, CABG and GDMT resulted in similar rates of survival (death from any cause, the study s primary outcome) after 5 years of follow-up. For several secondary outcomes at this time point, including 1) death from any cause or hospitalization for heart failure, 2) death from any cause or hospitalization for cardiovascular causes, 3) death from any cause or hospitalization for any cause, or 4) death from any cause or revascularization with PCI or CABG, CABG was superior to GDMT. 