A comparative study of TCD and CTA on lengthening or tortuous basilar artery / 实用放射学杂志

ABSTRACT

Objective To investigate the influence of lengthening or tortuous basilar artery (BA) on the BA hemodynamic parameters measured by transcranial doppler (TCD).Methods 153 cases with CTA and TCD simultaneously evaluating the BA were included.According to CTA criterion,144 cases were with lengthening and/or tortuous BA and 9 cases were without lengthening and/or tortuous BA.The TCD cerebral hemodynamic parameters included peak systolic velocity (PSV),mean blood flow velocity (MFV),end diastolic velocity (EDV),pulsatility index (PI) and resistant index (RI).The relationship between the grading of lengthening/tortuous of BA and TCD parameters were analyzed.Results ①The TCD parameters (PSV,MFV,EDV,PI,RI) showed no significant statistical differences among the grades of lengthening BA.The correlation between the TCD paremeters (PSV,MFV,EDV,PI,RI) and the grades of lengthening BA showed no significant statistical differences.②The TCD parameters (PSV,MFV,PI,RI) showed significant statistical differences among the grades of tortuous BA.The TCD parameters (PSV,MFV,PI,RI) showed significant statistical differences between grade 0 and grade 3 of tortuous BA.The significant negative correlation between the TCD parameters (PSV,MFV,EDV,PI,RI) and the grades of tortuous BA was found.Conclusion The tortuosity of BA can lead to hemodynamic alterations,whereas the lengthening of BA does not affect cerebral hemodynamics significantly.