Keywords Pulse wave transit time;blood pressure;head;R-wave-gated Preisovolumic time;Isovolumic contraction time;electrocardiogram;Phonocardiogram;Pulse wave;wireless sensor network;

• 脉搏波传导时间;血压;头部;心脏收缩始期;等容收缩期;心电;心音;脉搏波;无线传感器网络;