Although the primary out- come (death from any cause) was similar in the 2 treatment groups after an average of 5 years of follow-up, the data suggest the possibility that outcomes would differ if the follow-up were longer in duration; as a result, the study is being continued to provide follow-up for up to 10 years.371,372 Only very limited data comparing PCI with medical therapy in patients with LV systolic dysfunction are avail- able.356 In several ways, these data are suboptimal, in that many studies compared CABG with balloon angioplasty, many were retrospective, and many were based on cohort or registry data. Some of the studies demonstrated a similar survival rate in patients having CABG and PCI,359,451,490 492 whereas others showed that those undergoing CABG had better outcomes.320 The data that exist at present on revascu- larization in patients with CAD and LV systolic dysfunction are more robust for CABG than for PCI, although data from contemporary RCTs in this patient population are lacking. Therefore, the choice of revascularization in patients with CAD and LV systolic dysfunction is best based on clinical variables (eg, coronary anatomy, presence of diabetes melli- tus, presence of CKD), magnitude of LV systolic dysfunction, patient preferences, clinical judgment, and consultation be- tween the interventional cardiologist and the cardiac surgeon. 3.9.5. 