Comparación hemodinámica entre dos tipos de stent carotídeo

Resumo

Introduction. There are Doppler US criteria for diagnosis of high-grade restenosis after carotid stenting, although there is no consensus. Changes produced on arterial wall depends on characteristics and design of stent, so it may be necessary to con- sider them for establish those criteria. The aim of the study is to compare velocities in carotid arteries treated by two different types of stent. Patients and Methods. It is a prospective study and patients were included consecutively from October 2008 to May 2012. Includes two groups of patients treated by carotid stenting: one with Wallstent® (WS) and another one with Cristallo Ideale® (CRI). Doppler US was performed after intervention recording the following velocities: peak systolic velocity (PSV) and end diastolic velocity (EDV) at common carotid artery (CCA) 1 cm proximal to stent, 3 portions of stent and at distal internal carotid artery (ICA). Final intraoperative angiography was revised in all cases to verify morphological result. For statistical evaluation we used Welch t-test. Results. 37 patiens were included in the WS group and 9 in the other one. ICA VSM mean was 138 vs 120 cm/s (p =0,2) and ICA/ICC ratio was 1.68 vs. 1.63 (p=0,6), respectively. Doppler US velocities over 150 cm/s were obtained in 11 cases treated with WS and in one with CRl. Conclusions. Small differences exist, not statistically significant, in Doppler velocities of carotid arteries treated with WS compared to those treated with CRI