Izvestiya of Saratov University.
ISSN 1817-3020 (Print)
ISSN 2542-193X (Online)


pulse wave

Method for determining significant components for assessing pulse wave shape variability

Background and Objectives: The conventional approach to the quantification of the pulse wave is based on the assessment of the features of its shape within each beat to beat heart interval. Usually, a set of indices is calculated (such as heart efficiency index, reflection index, stiffness index), which are determined by the reference points of the wave contour. We have developed an alternative method aimed to analyze the variability of the pulse waveform regardless of the variability of its rhythm.

METHOD FOR DETERMINING SIGNIFICANT COMPONENTS FOR ASSESSING PULSE WAVE SHAPE VARIABILITY

Background and Objectives: The conventional approach to the quantification of the pulse wave is based on the assessment of the features of its shape within each beat to beat heart interval. Usually, a set of indices is calculated (such as heart efficiency index, reflection index, stiffness index), which are determined by the reference points of the wave contour. We have developed an alternative method aimed to analyze the variability of the pulse waveform regardless of the variability of its rhythm.

Estimation of the Value of Reverse Blood Flow in the Artery by the Second Derivative of the Pulse Pressure Wave

Background and Objectives: Previously, the diastolic section of the pulse wave was most often analyzed as the result of reflection of a direct wave from the elements of peripheral vessels. However, measurements of the negative linear velocity of blood flow using ultrasound dopplerograms clearly indicate the presence of reverse blood flow in the arteries. The aim of the work was to establish the relationship of the second derivative of the pulse pressure wave with the value of the reverse blood flow in the arterial bed.

Distal Pulse Measurement Provides Statistical, but not Dynamical, Features of the Central Pulse

Heart rate variability is recognized in medicine as an important prognostic factor. It is generally believed that the temporal characteristics of the pulse signal do not depend on the measurement point. Specifically, the distal (on the fingers) arrangement of the photoplethysmographic sensors. Using a high-precision measurement technique, we show that on the way from the heart to distally located measurement points, the value of each individual beat-to-beat time may change.

Reflection Index of the Pulse Wave for Young Athletes

Background and Objectives: The cardiovascular system of young athletes is subject to functional changes associated with an increase in both vasodilator capacity of blood vessels and an increase in vasoconstriction. Diagnostics of functional changes in the vascular system of athletes can be carried out by the sphygmographic method when measuring the reflection index, which characterizes the change in the tone of the smooth muscle wall of the vessel during an occlusive test.