摘要
目的:基于LabVIEW构建了便携式房颤检测系统。方法:系统采用上、下位机结构,上位机为笔记本电脑,下位机为心电采集模块,上下位机由USB口连接。提出概率密度函数法,研究R-R间期相空间重构后两点间距离的概率密度函数曲线形状并提取特征参数kn,可精确检测房颤。上位机软件采用LabVIEW编程,分为心电信号提取模块、R-R间期提取模块及概率密度函数法检测房颤模块。三个模块中设置了二个缓存,通过缓存模式保证三个模块并行运行,提高了系统的实时性。结果:实验表明该系统可快速准确检测房颤,只需60个R-R间期(不到1分钟的心电数据),检测房颤精度大于95%。结论:系统可用于房颤的快速、精确检测及房颤治疗后疗效的评估。
Objective: A portable Atrial Fibrillation(AF) detection system based on LabVIEW is developed.Methods: The system adopts master machine and slave machine architecture.The master machine is a laptop.The slave machine is an ECG acquisition module.The master and slave machines are connected by a USB port.Probability density function(PDF) method is proposed to study the PDF curves of the distance between two points in the reconstructed phase space of R-R intervals.The characteristic parameter kn is defined,which can detect atrial fibrillation with high precision.The master machine software is programmed with LabVIEW,which includes ECG acquisition module,R-R intervals pickup module and AF detection module.Two buffers are set up between three modules to ensure these modules can run parallelly,which enhance the real time capability of the system.Results: Experiments demonstrate that the system can detect AF quickly(only 60 R-R intervals are needed,which means less than one minute of ECG) and has high detection pricision(>95%).Conclusions: The system can be used to detect AF and to evaluate the therapeutic effect of AF treatment.
出处
《中国医学物理学杂志》
CSCD
2011年第4期2792-2795,共4页
Chinese Journal of Medical Physics
基金
上海高校特聘教授(东方学者)岗位计划资助
关键词
R-R间期
概率密度函数
相空间重构
房颤检测
R-R intervals
probability density function
phase space reconstruction
atrial fibrillation detection
