Two tables under the rhythmogram strip represent testing parameters of the supine (left) and upright (right) positions. The tables included the following parameters:
The TI index determines the tension of HRV regulation mechanisms. It is an integral index of decrease in variability.
SC1, SC2, Sc3: Indexes corresponding to the three main spectral components of the Rhythmogram
SC1: Index of "respiration" component of HRV, which corresponds to 2-8 Seconds waves.
SC2: Index of baroreflex influences on the HRV which corresponds to the Traube-Gaering Waves with lengths of 8-18 seconds.
SC3: Slow wave component activity index corresponding to Mayer waves of 80-90 seconds in length.
In the center there is a strip of the rhythmogram, which represents the transition process (RR intervals from 192 to 256). It allows us to evaluate accuracy of the automatic filtering of the transition process. This is necessary because of possible artifacts that may distort the shape of transitional rhythmogram. This cut of the rhythmogram strip is slightly different from the rhythmogram strip itself, its main goal is to correctly define "min" and "max" of the transition process which allows a higher degree of accuracy in determining the levels of the Chronotropic Myocardial Reaction (ChMR) and of Vascular Compensation (VC)
The transition parameters table (to the right of the transition rhythmogram cutout) includes the following:
ChMR: Chronotropic Myocardial reaction index, which allows us to evaluate the Level of cardiac adaptation reserves
VC: Evaluating vascular compensatory reaction
IOT: Integral evaluation of the transitional process
The text under the transition rhythmogram strip represents the conclusion about the character of the transitional process, which is obtained by the analysis of the above indexes. There are five groups of conclusions:
1. Normal Transition
Transition is within normal parameters.
Transition is close to the normal parameters.
2. General reaction decreases to the orthotest.
General reaction slightly decreases in response to orthotest.
General reaction decreases moderately in response to orthotest.
General reaction decreases significantly in response to orthotest.
General reaction decreases sharply in response to orthotest.
3. Compensatory reaction decrease while chronotropic reaction is normal or conditionally normal.
Recovery reaction slightly decreases in response to orthotest while chronotropic reaction is within normal parameters.
Recovery reaction slightly decreases in response to orthotest while. Chronotropic reaction is close to the normal parameters.
Recovery reaction decreases moderately in response to orthotest while chronotropic reaction is within normal parameters.
Recovery reaction decreases moderately in response to orthotest while chronotropic reaction is close to the normal parameters.
Recovery reaction decreases significantly in response to orthotest while chronotropic reaction is within to normal parameters.
Recovery reaction decreases significantly in response to orthotest while chronotropic reaction is close to the normal parameters.
Recovery reaction decreases sharply in response to orthotest while chronotropic reaction is within normal parameters.
Recovery reaction decreases sharply in response to orthotest while chronofropic reaction is close to the normal parameters.
4. Chronotropic reaction decreases while compensatory reaction is absent.
Chronotropic reaction decreases moderately in response to orthotest while recovery reaction is absent.
Chronotropic reaction decreases significantly in response to orthotest while recovery reaction is absent.
Chronotropic reaction decreases sharply in response to orthotest while recovery reaction is absent.
5. "Mixed" decreases of Chronotropic reaction and compensatory reactions.
Chronotropic reaction decreases moderately in response to orthotest while recovery reaction decreases significantly.
Chronotropic reaction decreases significantly in response to orthotest while recovery reaction decreases sharply.
Chronotropic reaction decreases moderately in response to orthotest while recovery reaction decreases sharply.
Chronotropic reaction slightly decreases in response to orthotest while recovery reaction decreases moderately.
Chronotropic reaction slightly decreases in response to orthotest while recovery reaction decreases significantly.
Chronotropic reaction slightly decreases in response to orthotest while recovery reaction decreases sharply.
The first group represents a high level of reaction parameters. The second group of conclusions reflects general decreased reaction to orthotest, which happens when Chronotropic and compensatory reactions are equally decreased. The third group of conclusions reflects different grades of compensatory reaction decreases and normal or conditionally normal Chronotropic reaction. The fourth group represents the absence of compensatory reaction and different grades of Chronotropic reaction decreases. The fifth group reflects different correlation of compensatory reactions and Chronotropic reaction decreases.
NOTE1: It is necessary to remember, while analyzing above conclusions that these reactions may be viewed from the point of the reaction to the orthotest only.
NOTE2: The conclusion about Chronotropic reaction level is formed on the basis of joint analysis of all three indexes of transitional processes.
On the bottom left of Figure 17 values of parameters are called: Parameter of Optimal Variability:
POV (supine)
POV (upright)
Both are parameters of Optimal HRV wave structure, which shows quantitatively the closeness of an individual wave structure to the ideal. This parameter defines the deviations of a subject's variability from the ideal variability. There is a fixed correlation among the spectral components of a wave structure (SCI, SC2, and SC3) and how they are applied in the POV calculation.
NOTE:The POV is calculated through analysis of the SC1, SC2, SC3 indexes and a number of additional parameters obtained during spectral analysis. The range of POV changes is within 1 to 38.
Certain correlation of SC1, SC2, SC3 indexes corresponds to an optimal value of the POV (see the example in Figure 17).
The range of definition of SC1, SC2, SC3 is 1 to 15, where 1 corresponds to the highest activity and 15 to the lowest activity.
INDEX of DISCREPANCY (ID): Gives a quantitative evaluation of the HRV structure discrepancy level after the transition period. ID may be also called an equilibrium parameter, as it permits the evaluation of the recovery of the HRV wave structure components after any influence.
The range of ID index changes is within -3 to 35.
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