Abstract:

Objective：To investigate color Doppler ultrasound spectrum of carotid artery in patients with isolated systolic
hypertension. Methods：One hundred and fifty -eight cases of isolated systolic hypertension，30 cases of isolated diastolic hypertension and 32 cases of systolic hypertension and diastolic hypertension were conducted carotid artery testing with color Doppler ultrasound. Results：Widened carotid diameter，thickened intima （average thickness 1.0~1.4 millimeter）and slowed peak flow rate were observed in all essential hypertension patients. However，carotid artery resistance index was significantly highest in isolated systolic hypertension group（carotid：0.86±0.07 millimeter，internal carotid artery：0.73±0.06 millimeter，the external carotid artery： 0.91 ±0.09 millimeter）. Conclusion：The study showed that ultrasound carotid artery resistance index could be a guide to the classification of essential hypertension.

Key words: isolated systolic hypertension, carotid artery, color Doppler ultrasound