Trombolisis can be performed mecahanically or pharmacomechanically. While, the immediate success rate is higher in grafts than autogenous arteriovenous (AV) fistula (99 vs 93% in forearm fistula), the primary patency rate of the forearm arteriovenous fistula at 1 year is much higher . One year secondary patency rates are 80% in forearm and 50% in upper arm arteriovenous fistula., respectively. In arteriovenous fistula, the combination of a thrombolytic agent (urokinase or tissue plasminogen activator=tPA) with balloon angioplasty resulted in an immediate success rate of 94%. Flow restoration was achieved in 88,9% of the arteriovenous fistula.