Table 1.

Summary of existing international guidelines on revascularisation in patients with LV systolic dysfunction with predominant heart failure symptoms

Society	Guideline	Year	Recommendation	Class	Level
AHA	CABG	2011	CABG to improve survival is reasonable in patients with mild to moderate LV systolic function (EF 35–50 %) and significant (≥75 % diameter stenosis) multi-vessel CAD or proximal LAD stenosis, where viable myocardium is present in the region of intended revascularisation	IIa	B
AHA	CABG	2011	CABG might be considered with the primary or sole intent of improving survival in patients with stable IHD with severe systolic dysfunction whether or not viable myocardium is present	IIb	B
AHA	Heart failure	2013	CABG should be considered in patients with ICM and operable coronary anatomy whether or not viable myocardium is present	IIb	B
ESC	Heart failure	2012	CABG is recommended for patients with angina and significant left main stem stenosis, who are otherwise suitable for surgery to reduce the risk of premature death	I	C
ESC	Heart failure	2012	PCI may be considered as an alternative to CABG in patients unsuitable for surgery	IIb	C
ESC	Myocardial revascularisation	2014	Revascularisation for prognosis in patients with 2- or 3-vessel coronary artery disease with stenosis >50 % and impaired LV function (EF <40 %)	I	A
ESC	Myocardial revascularisation	2014	CABG is recommended in left main stem stenosis in patients with severe LV dysfunction	I	C