摘要
为了获取冠状动脉堵塞病人的心音特征,从而为临床预诊断冠状动脉疾病提供新的无损检测方法,通过非线性时间序列分析的方法———相关维来分析心音时间序列,获得了有关冠状动脉堵塞的血液动力学特征信息.对相关病例进行分析,发现通过相关维数刻划出了大多数冠状动脉堵塞病人的心舒期心音序列内在的确定性行为;而大多数正常人的心舒期心音序列得不到具体的相关维数.利用本文提供的相关维数分析方法,在曲线D2(M;r)-ln(r)上寻找平台期,可以达到对冠状动脉疾病无损检测的目的.
To acquire the feature of heart sounds of patients with coronary artery disease （CAD）, nonlinear dynamics methods, such as correlation dimension, were employed to describe heart sounds of the diastolic for noninvasive detection of CAD. The analysis showed that the patient group has complex deterministic behavior characterized by correlation dimension. However, the majority of the normal subjects could not be scaled by correlation dimension. By the method of correlation dimension analysis, flat period of D2 （M;r）-ln （r） curve can be found for noninvasive detection of CAD.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第8期1473-1476,共4页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(30470470)
关键词
心舒期
相空间重构
奇异值分解
相关维
diastolic
embedding space
singular value decomposition
correlation dimension
