The number of percutaneous transluminal angioplasty (PTA)procedures performed in iliac, femoral, and popliteal vessels hasincreased several folds in the past decade. The practice of infrapoplitealPTA is likely to increase as more clinicians developthe skills, because it is perceived as a low-risk procedure with apotentially beneficial outcome, which does not jeopardizesubsequent alternative treatment.The most common and accepted indication for PTA ofinfrapopliteal vascular disease is in limb salvage patients withchronic critical limb ischemia (CLI) defined in the RutherfordBecker classification as categories 4,5, and 6 . This patientpopulation often has limited surgical options. In addition evenshort-term patency rates can have the significant clinical benefitsof limb salvage and wound healing.Infrapopliteal percutaneous transluminal angioplasty (PTA) iscurrently indicated in patients with critical limb ischaemia (CLI).Patients with CLI are typically elderly withmultiple co-morbiditiesand limited life expectancy and therefore, a procedure, which isminimally invasive with reduced morbidity and mortality but lesserlong-term patency, may be more appropriate than a more invasiveprocedure with better long-term patency,so this thesis discuss roleof angioplasty in infrapopliteal arterial occlusive . Disease ,resultsvalues, and complications.