Symptomatic Trial of Angina Assessment Prior to Revascularization

Inclusion Criteria: 1. Angina or angina-equivalent symptoms 2. Anatomical evidence of a significant single vessel coronary stenosis on diagnostic coronary angiography indicating ≥ 70% stenosis 3. Referred for percutaneous coronary intervention for treatment of stable angina Exclusion Criteria: 1. Age younger than 18 2. Age older than 85 3. Recent acute coronary syndrome 4. Multivessel coronary artery disease 5. Previous coronary artery bypass graft surgery 6. Significant left main stem coronary disease 7. Chronic total occlusion in the target vessel 8. Contraindication to percutaneous coronary intervention or drug-eluting stent implantation 9. Contraindication to antiplatelet therapy 10. Contraindication to adenosine infusion 11. Severe valvular disease 12. Severe LV systolic impairment 13. Severe respiratory disease 14. Life expectancy less than 2 years, pregnancy, unable to consent