Objective To study the application of color Doppler ultrasound in hypertension.Method 144 cases hypertension patients were examinated by single transcranial Doppler ultrasound(TCD)and color Doppler flow imaging(CDFI).Result When hypertension the blood flow velocity and PI were many increased abnormality of the spectrum,such as double peak distance increase or decrease,systolic peak was high-sharp or circle-top,P 2>P 1,with signal of abnormal blood flow and murmur.Abnormality and changes step up with ag...