[The heartbeat modes in modified Ikeda phase resetting model].
In this paper are proposed four heartbeat models which correspond to two different positions of the ectopic pacemaker and two coupling styles of the sinus and ectopic pacemakers. The models computed are based on the modified Ikeda phase resetting model. Most of the heartbeat modes are periodic; they exhibit "Arnold's tongue" structure in parameter plane of perturbing frequency and strength. When the ectopic pacemaker is located in the ventricle, there are bistable dynamic modes. The abnormal hearbeat rhythms of bigeminy and trigeminy in clinical medicine have been observed when coupling strength is weaker in odd resetting or refractory time is longer in even resetting.
Li
Li
L
Department of Biophysics, China Medical University, Shenyang 110001, China. lilyli@mail.cmu.edu.cn
Hong
Yang
Y
Liu
Li
L
Zhang
Guangcai
G
Wang
Guangrui
G
Qu
Zhi
Z
D002304:Cardiac Pacing, Artificial / Q000379:methods*; D003198:Computer Simulation; D004562:Electrocardiography; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008955:Models, Cardiovascular; D012849:Sinoatrial Node / Q000502:physiology*