[The pulse-respiratory quotient of persons with stable and instable postural circulation while standing (author's...

The pulse-respiratory quotient of patients with postural circulatory instability is the same in a prone position as that of patients with stable postural circulation, however, it is higher in an upright postiion. This is not only caused by the higher pulse frequency of postural circulatory instable patients while standing, but also by the lower respiratory rate. The difference of the pulse-respiratory quotient between standing and lying indicates with more accuracy the diagnosis of postural circulatory instability. The severity of the symptoms is related not only to the pulse and respiratory rate, but also to the pulse-respiratory quotient. Tachycardiac patients with a high pulse-respiratory quotient show clinically symptoms more severe than tachycardiac patients with lower pulse-respiratory quotients. Due to the results shown here, the terms of rhythmical concordance and discordance are proposed.