Value Of Lorenz Scatter Diagram And 3D RR Scatter Diagram In Heart Rate Variability Analysis

Objective to explore the diagnostic value of Lorenz scatter plots and three-dimensional RR scatter plots in heart rate variability（HRV）analysisMethods Selected 641 patients who underwent Holter monitor in our hospital,and collected the SDNN,Lorenz scatter plots and three-dimensional scatter plots indexes（L₀,W,L₀/W,L,L₁,L₂）.According to the SDNN value,the patients were divided into three groups:normal HRV group,HRV slight decrease group and HRV severe decrease group.We calculated the correlation between all indexes and SDNN value and tested the diagnostic value of different indexes in the reduction of HRV and its reduced degree by ROC curves.Results 1.Among the three groups,all the indexes were correlated with SDNN,and the correlation between the long axis of"sinus rhythm point"pattern（L₀,L,L₁,L₂）and SDNN was the most significant.2.ROC curve showed that the area under the curve（AUC）of L₀was the largest in the Lorenz scatter plots and the AUC of L₂in the three-dimensional scatter plots,and the best critical values were 854.60ms and 480.00ms.3.The ROC curve of severe decreased HRV showed that the AUC of L₀was 0.973 and the AUC of L₂was 0.972,and the best critical values were 564.30ms and 382.50ms respectively.Conclusion The long axis of"sinus rhythm point"in Lorenz and three-dimensional scatter plots has a great diagnostic value in HRV.