Risk Assessment Scheme of Ellis et al for Outcome After Percutaneous Coronary Intervention (PCI)

Length of the calcification in the target vessel

Is the lumen of the target vessel irregular?

Is there a filling defect?

Is the luminal lesion eccentric?

Is the lesion calcified and angulated 45° or more?

Is calcification of the lesion severe?

Is there total occlusion of the target vessel?

Is there evidence that the total obstruction is chronic?

Does the patient have a saphenous vein graft?

Is there degeneration of the saphenous vein graft?

Number of years that the saphenous vein graft has been in place