The Korean Journal of Physiology
- Volume 8 Issue 2
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- Pages.33-44
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- 1974
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- 0300-4015(pISSN)
Changes of the Electrocardiogram and Blood Picture of Frogs in Four Seasons
개구리 심전도(EKG) 및 혈액상의 계절에 따른 변화
- Rhee, Jung-Moo (Department of Physiology, Kyungpook National University School of Medicine) ;
- Bae, Sung-Ho (Department of Physiology, Kyungpook National University School of Medicine) ;
- Shin, Hyun-Chan (Department of Biology, Kyungpook National University College of Liberal Arts and Sciences) ;
- Chae, E-Up (Department of Physiology, Kyungpook National University School of Medicine)
- Published : 1974.12.01
Abstract
The electrocardiogram of frogs were obtained in winter (January), spring (April), summer (July) and autumn (September and November). Electrocardiograms were recorded applying electrodes to the atria, ventricle and apex of the heart by unipolar or bipolar leads. V wave was recorded prior to P wave, for the presence of the sinus venosus which controls the automaticity of the frog heart, in four seasons. Regardless of the leads or the position of the electrodes P wave was diphasic and wide. According to the rise of temperature the rate of heart beat was increased, and V-P and P-R interval were shortened. Two regression line between R-R interval and both V-P interval and P-R interval were drawn. These were calculated as V-P interval=1 0.276R-R
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