论文信息 - Clinical monitoring of the Tilt-Test: Task Force Monitor (TFM) and Heart Rate Variability (HRV)

Clinical monitoring of the Tilt-Test: Task Force Monitor (TFM) and Heart Rate Variability (HRV)

The study of the Heart Rate Variability, using autoregressive analysis (AR) during Tilt Test, represents the leading approach to evaluate the sympathetic and vagal balance of the autonomic nervous system [1]. In clinical practice, AR is performed with traditional instrumentations (like GRPSD software) or with apparatuses of new generation like the Task Force Monitor (TFM). GRPSD allows a very accurate step-by-step spectral analysis but the procedure is quite complex; TFM, instead, analyses the ECG signals and presents autoregressive analysis in real time, but it is a ldquoclosed systemrdquo and it is not possible to verify the procedures performed by the system. To compare the two systems, 9 subjects were submitted to tilt test. AR analysis was performed on 39 different time intervals with both TFM and GRPSD. LF/HF ratios were compared. Concordance was present in the 82% of the cases but a mismatch was found in the remaining 18% probably due to the limitations in the analysis performed by TFM.

[1] F. Schlindwein,et al. A study on the optimum order of autoregressive models for heart rate variability. , 2002, Physiological measurement.

[2] G. Breithardt,et al. Heart rate variability: standards of measurement, physiological interpretation and clinical use. Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. , 1996 .

[3] A. Malliani,et al. Heart rate variability. Standards of measurement, physiological interpretation, and clinical use , 1996 .

[4] L. F. Junqueira,et al. Study on the optimal order for the auto-regressive time-frequency analysis of heart rate variability , 2003, Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439).

[5] J. Sztajzel. Heart rate variability: a noninvasive electrocardiographic method to measure the autonomic nervous system. , 2004, Swiss medical weekly.