Study of Efficacy and Safety of Percutaneous Coronary Intervention to Improve Survival in Heart Failure

Inclusion Criteria: ALL of the following: 1. Poor left ventricular function (EF≤35%) 2. Extensive coronary disease 3. Viability in at least 4 dysfunctional segments that can be revascularised by PCI Exclusion Criteria: 1. Myocardial infarction \< 4 weeks prior to randomisation (clinical definition) 2. Decompensated heart failure requiring inotropic support, invasive or non-invasive ventilation or Intra-aortic Balloon Pump/left ventricular assist device therapy \<72 hours prior to randomization 3. Sustained Ventricular Tachycardia/Ventricular Fibrillation or appropriate Implantable Cardioverter Defibrillator discharges \<72 hours prior to randomization 4. Valve disease requiring intervention 5. Contraindications to percutaneous coronary intervention 6. Age \<18 yrs 7. Estimated Glomerular Filtration Rate \< 25 ml/min, unless established on dialysis 8. Women who are pregnant 9. Previously enrolled in REVIVED-BCIS2 or current enrollment in other study that may affect REVIVED-BCIS2 outcome data 10. Life expectancy \< 1 yr due to non-cardiac pathology