Class I indications for myocardial revascularization for improvement of prognosis:
- stable angina pectoris left main coronary artery stenosis of > 50% + documented cardiac ischaemia,
stable angina pectoris left main coronary artery stenosis of  50-90% + absence of documented cardiac ischaemia + myocardial fractional flow reserve < 0,80,
stable angina pectoris proximal LAD stenosis of > 50% documented cardiac ischaemia,
stable angina pectoris proximal LAD stenosis of  50-90% + absence of documented cardiac ischaemia + myocardial fractional flow reserve < 0,80,
stable angina pectoris + impaired LV function + multi-vessel coronary artery disease documented cardiac ischaemia, 
stable angina pectoris + impaired LV function multi-vessel coronary artery disease + absence of documented cardiac ischaemia + myocardial  fractional flow reserve < 0,80,
stable angina pectoris + single patent coronary artery stenosis of > 50% + documented cardiac ischaemia,
stable angina pectoris + single patent coronary artery stenosis of  50-90% + absence of documented cardiac ischaemia + myocardial fractional flow reserve < 0,80,
stable angina pectoris ischeamia including > 10% of left ventricular and caused by coronary artery stenosis of > 50%.

Class III indication for myocardial revascularization for improvement of prognosis:
stable angina pectoris + one-vessel coronary artery disease + absence of proximal LAD stenosis + absence of ischeamia including > 10% of left ventricular.