CAJ | 학술논문

为刻划心脏节律存在的确定性动力学特征，运用不稳定周期轨道分析方法对健康青年人的RR间期时间序列数据进行分析。研究结果揭示健康人心脏节律中存在显著的不稳定周期轨道及不稳定周期轨道分级(周期1，周期2，周期3，周期4)现象，表明健康青年人心脏节律的动力学特性中包含着显著的确定性行为。通过跟踪不稳定周期轨道随时间的演变，亦表明心脏节律的变化中存在着固有的非平稳性。
위각화심장절률존재적학정성동역학특정，운용불은정주기궤도분석방법대건강청년인적RR간기시간서렬수거진행분석。연구결과게시건강인심장절률중존재현저적불은정주기궤도급불은정주기궤도분급(주기1，주기2，주기3，주기4)현상，표명건강청년인심장절률적동역학특성중포함착현저적학정성행위。통과근종불은정주기궤도수시간적연변，역표명심장절률적변화중존재착고유적비평은성。
To characterize the deterministic dynamics in heart rhythm,theunstable periodic orbit analysis were the RR interval time series of healthy young men.The unstable periodic orbits (UPO) with statistical significance and the hierarchies of UPOs(period 1,period 2,period 3 and period 4) have been extracted from the heart rhythm.It suggests that in healthy young men,the dynamics of normal heart rhythm contains significant deterministic components.Furthermore,the inherent non-stationary of the heart rhythm can be shown by developing of period 1 orbit.The results provide further evidences to verify that chaos dynamics exists in heart rate variability.