2.2 ECG Monitoring
91
2.2.5. Analysis of Heart Rate Variability (HRV)
The device provides the output of graphical and numerical information for the HRV analysis (see
Fig. 2-12):
Figure 2-12. Window of HRV analysis
For correct operation of HRV analysis, it is necessary to select the HR / PR
display mode by the ECG channel (it. 1.3.8)
In the left part of the HRV analysis window there is a rhythmocardiogram (or just a rhythmo-
gram). The vertical axis shows the duration of the cardiointervals in seconds. Moving the cursor
along the horizontal axis reflects the registration of new detected cardiointervals in the ECG
channel.
In the right part of the window there is a histogram reflecting the relative number of different val-
ues of the cardiointervals over a long time. The horizontal axis is the duration of the cardiointer-
vals (0.2 s in one division). The vertical axis represents the number of cardiointervals of a cer-
tain value in % to the total number of cardiointervals.
HRV indicators are displayed to the right of the histogram:
МО (moda) – the duration of the most frequent cardiointerval in seconds;
АМО (moda amplitude) – number of moda values in% to the total number of cardio-
intervals;
RV (rhythm variability) - the width of the histogram in seconds.
The device also calculates the pressure index (PI) of regulatory systems (according to Baev-
sky), which is one of the parameters for assessing the degree of adaptation of the cardiovascu-
lar system to random or constantly acting aggressive factors and assessing the adequacy of
regulation processes:
PI = AMO / (2 * RV[msec] *
МО[msec]).
The pressure index of regulatory systems is calculated only in the presence
of sinus rhythm and in the absence of ventricular and supraventricular ex-
trasystoles (see it. 2.2.2).
Summary of Contents for MPR6-03
Page 1: ...Patient Monitor MPR6 03 User Manual RM 501 01 000 01 01 UM Version 7 05 2020 ...
Page 2: ...2 ...
Page 193: ...193 ...
