When is thrombolysis for acute lower limb ischemia worthwhile?

Area of Science:

• Vascular Surgery
• Interventional Cardiology
• Thrombolysis Research

Background:

• Acute lower limb ischemia (ALI) poses significant risks for limb loss and mortality.
• Thrombolytic therapy is a key treatment modality for ALI, but outcomes can vary.
• Identifying factors influencing treatment success is crucial for optimizing patient care.

Purpose of the Study:

• To identify variables associated with successful thrombolytic treatment outcomes in patients with ALI.
• To determine predictors of successful lysis, absence of life-threatening complications, and long-term clinical success.

Main Methods:

• Re-analysis of a prospective multicenter study involving 121 patients with ALI.
• Multivariate analyses were performed on previously collected data, irrespective of thrombolysis dose.
• Predictive variables were assessed for their association with treatment outcomes.

Main Results:

• Successful thrombolysis was associated with prior thrombolysis, ankle-brachial index > 0.33, absence of motor dysfunction, cardiac arrhythmia, and lysis of a vascular graft.
• Predictors of absence of life-threatening complications or death included prior thrombolysis, age < 70 years, and ankle-brachial index > 0.33.
• Clinical success (limb and life preservation) at one year was linked to successful lysis, age < 70 years, and lysis of a native artery over a graft.

Conclusions:

• Prior thrombolysis, age under 70, and less severe ischemia predict successful thrombolysis with fewer complications.
• Successful thrombolysis strongly predicts amputation-free survival and vascular patency for at least one year.
• While grafts can be reopened, thrombolysis of native arteries yields better long-term outcomes.