A method, system and computer readable medium for deriving central aortic systolic pressure by reversing the order of a set of predetermined number of blood pressure measurements to obtain a reversed blood pressure set； averaging the reversed blood pressure set such that the average set represents a moving average waveform； overlaying the reversed blood pressure set and the moving average waveform； identifying a point of intersection on the reversed arterial waveform and the moving averaging waveform, and setting the central aortic systolic pressure as reversed blood pressure value in the reversed blood pressure set nearest to the point of intersection.一種藉由反向一預定數目血壓量值集合的順序以獲得一反向血壓集合來推導出主動脈收縮壓之方法、系統及電腦可讀取媒體；平均該反向血壓集合以使得該平均集合表示一移動平均波形；覆蓋該反向血壓集合及該移動平均波形；識別該反向動脈波形與該移動平均波形上的一交點，並將該中央主動脈收縮壓設定為該反向血壓集合中最接近於該交點之一反向血壓值。
