%0 Journal Article
%A Jen-Pu Tsai
%A Li-Chu Tung 
%A Ming-Chung Lee and Jin-Tun Lin
%T The Effects of Octopamine on the Cardiac Output of Cockroach by Using Computer-based Video Analysis on Measuring Stroke Volume
%D 2004
%J Taiwania
%V 49
%N 1
%P 7-15
%U https://taiwania.ntu.edu.tw/abstract/10
%X A computer-based video analysis system has been developed for measuring the stroke volume and the heart rate of the insect. A quantitative evaluation of the effects of octopamine (OA) on the heart rate, stroke volume and cardiac output of Periplaneta americana, the American cockroach, was also studied. The heart rate of OA-treated cockroach significantly increased within 2 minutes, compared to that of the control groups. On the other hand, the stroke volumes of OA-treated cockroaches decreased within 2 minutes (p < 0.05). Furthermore, OA elicited the heart rate and the stroke volume with a dose- dependent response. Although OA increased heart rate and decreased stroke volume in the cockroach, it decreased cardiac output (mL/min) calculated based on heart rate (beats/min) and stroke volume (mL/beat).
%M doi:10.6165/tai.2004.49(1).7