A Trial Comparing Routine Versus Selective Use of Completion Angiography After Surgical Thromboembolectomy in the Treatment of Acute Lower Limb Ischemia and Their Impacts on Limb Salvage Rates

Inclusion Criteria: * Grade I (1) (viable) acute ischemia which there is no immediate threat of limb loss; the patient is presented with neither sensory nor motor weakness and there are audible Doppler signals in both arteries and veins. * Grade IIA (2 A) (marginally threatened) acute ischemia which needs proper treatment to save the limb; the patient is presented with a minimal sensory loss, no motor weakness, inaudible arterial Doppler signals but the venous Doppler signals are still audible. * Grade IIB (2 B) (immediately threatened) acute ischemia which needs immediate revascularization to save the limb; the patient is presented with a sensory loss associated with rest pain, mild to moderate motor weakness, inaudible arterial Doppler signals but the venous Doppler signals are still audible. Exclusion Criteria: * Traumatic or iatrogenic acute limb ischemia * Grade III acute ischemia (irreversible) with major tissue loss and major amputation is inevitable; the patient presented with sensory and motor loss, inaudible arterial and venous Doppler signals. * Patients With occluded bypass graft. * Acute limb ischemia due to intra-arterial injection * Patients with chronic renal impairment (serum creatinine \> 1.2) or with a history of contrast-induced nephropathy. * Acute lower limb ischemia due to thrombosed aneurysms