心率变异(HRV)是指窦性心律的异动性。HRV作为疾病的生命预后和恶性心律失常等突发心脏事件的预测指标,正在越来越多地被临床所接受和采纳。时域和频域指标是已被公认的传统分析方法。Lorenz图是继时域域频分析之后用于HRV分析的又一新方法,作为混沌方法的Lorenz图属于非线性动 Heart rate variability (HRV) refers to the abnormality of sinus rhythm. HRV as a prognostic indicator of sudden cardiac events such as life expectancy and malignant arrhythmia is increasingly being accepted and adopted clinically. Time and frequency domain indicators are well-established traditional analytical methods. Lorenz graph is another new method for HRV analysis after time-domain domain frequency analysis. The Lorenz graph as a chaotic method belongs to nonlinear motion