When either revascularisation procedure is appropriate, explain to the person: The main purpose of revascularisation is to improve the symptoms of stable angina. CABG and PCI are effective in relieving symptoms. Repeat revascularisation may be necessary after either CABG or PCI and the rate is lower after CABG. Stroke is uncommon after either CABG or PCI, and the incidence is similar between the two procedures. There is a potential survival advantage with CABG for some people with multivessel disease. Discuss the following with people whose symptoms are satisfactorily controlled with optimal medical treatment: their prognosis without further investigation the likelihood of having left main stem disease or proximal three-vessel disease the availability of CABG to improve the prognosis in a subgroup of people with left main stem or proximal three-vessel disease the process and risks of investigation the benefits and risks of CABG, including the potential survival gain. Guidance People have the right to be involved in discussions and make informed decisions about their care, as described in NICE's information on making decisions about your care. Making decisions using NICE guidelines explains how we use words to show the strength (or certainty) of our recommendations, and has information about prescribing medicines (including off-label use), professional guidelines, standards and laws (including on consent and mental capacity), and safeguarding. Recommendations 1.5.2 and 1.5.12 partially update recommendation 1.2 of the NICE technology appraisal guidance on myocardial perfusion scintigraphy for the diagnosis and management of angina and myocardial infarction. The following guidance is for people who have a diagnosis of stable angina and is based on the best available evidence. The full guideline gives details of the methods and the evidence used to develop the guidance. 1.1.1 Diagnose stable angina according to the NICE guideline on recent-onset chest pain of suspected cardiac origin. 