[Changes of carotid wave intensity in patients with different blood pressure and its clinical significance]

Wave intensity (WI) is a new technique in Echocardiography. We can understand the haemodynamics about interaction between the left ventricle and peripheral arteries by WI. The indexes of WI mainly included W1, W2 and NA. W1 can reflect the contractility of left ventricule. W2 can reflect the ability of cardiac actively to stop the blood flow. NA can reflect the resistance of peripheral artery. The subjects included three groups that they were patients with uncured primary hypertension (HP1), cured primary hypertension (HP2) and normal controls (NC). Carotid WI examination was performed and analyzed. The results showed that the WI contributed to understand the changes of hamodanymic caused by interaction between peripheral artery resistance and relevant left ventricular systolic function and it was more sensitive than routine echocardiography. The W1 and NA help to assess the curative effect and follow-up of primary hypertension.