Significance of new parameters in evaluation the function of carotid artery / 中华超声影像学杂志

ABSTRACT

Objective To evaluate the parameters of inner diameter different rate (D%), mean wave intensity(MWl) and diameter-adjusted mean wave intension(DAMWI) in assessing the function of common carotid artery(CCA) by quality intima-media thickness(QIMT) technique. Methods Twenty-four healthy subjects were performed 2D and CDFI examination under the normal quiescent and cold pressor test(CPT) condition respectively. The diastolic and systolic diameters of left-CCA were measured by QIMT respectively. Corresponding the inner diameter different range,rate,MWI and DAMWI were calculated respectively. The curves of their ROC were drawn. Results The different range and rate of diameters were decreased when subjects suffered CPT (P< 0.05) ,but the MWI and DAMWI were increased (P<0. 05). The areas under the ROC curves were 0. 827,0. 821 and 0.728 corresponding DAMWI, MWl and different rate of diameter. There was no significant difference among them(P>0. 05). Conclusions Conclusions The changed rate of diameter can be measured exactly by QIMT. The function of CCA can Be evaluated by MW1 and DAMWI which were calculated by conventional parameters.