Abstract: ObjectiveTo evaluate the value of transcranial Doppler (TCD) in pecutaneous transtuminl angioplasty and stenting (PTAS).MethodsThe index of hemodynamics, include mean peak flow velocity (V_m), systolic peak flow velocity (V_s), enddiastolic peak flow velocity (V_d), pulsatility index (P_i), resistance index (R_i) in 47 cases with the stenosis of the middle cerebral artery were investigated, while compared with that of intra arterial digital subtraction angiography (DSA). ResultsV_s and V_m of 41 cases increased while the P_i reduced after operation, R_i had no change; V_s, V_m, V_d increased and P_i reduced with no reflow signal in 5 cases. V_s and V_m increased with V_d reduced in only 1 case. The accuracy rate with DSA in moderate or severe stenosis was 75% or 83% respectively. ConclusionTCD, as it's reliable, no-invasive, convenience and cheap, can play an important role in assessing the effect of PTAS in middle cerebral artery stenosis.

Key words: transcranial Doppler, digital subtraction angiography (DSA), middle cerebral artery stenosis, pecutaneous transtuminl angioplasty and stenting (PTAS)