To study the relationship between the different pulse conditions and the picture of the capacity of blood vessel, the photoplethysmogram of the 432 receivers (consist of normal pulse condition and 10 common pulse conditions) with 'BC-4' photoplethysmograph were examined,meanwhile hemodynamics parameteres were analysed. As compare with the normal pulse, the results showed that photoplethysmograms of different disease pulse conditions demonstrate featuer of its parameters,and the change of hemodynamics parameters represent feature of cardiovascular pathophysiology formed different pulse. It sugg...