[Effect of temperature on the heart function of the five-strip eyebrow squirrel].
This is an in vitro study designed to assess the effect of temperature variation on the heart function of the five-strip eyebrow squirrel--amammal of the hibernating kind. A heart model of exsomatizing action and for determining the physiological parameters with four physiological recorders was used to measure the LVSP, LVEDP and (+/- dP/dtmax), respectively. It was found that the curves of the squirrel's heart mechanics property in relation to temperature variation are similar to the curves of the non-hibernating animals'. But, the squirrels' heart contraction function changes with in a much wider range, suggesting that their hearts are more tolerant of temperature variation.
Chengde Medical College, Chengde 067000.
Donghai
D
Liu
Qiushi
Q
Zhang
Liyan
L
Liu
Jianjun
J
Zheng
Shiying
S
Tang
You
Y
Zhang
Yukun
Y
Din
Ping
P
Zhang
D000818:Animals; D001696:Biomechanical Phenomena; D005260:Female; D006321:Heart / Q000502:physiology*; D006605:Hibernation; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction; D012589:Sciuridae / Q000033:anatomy & histology* / Q000502:physiology; D013696:Temperature