The history of electroencephalography begins since 1929, when german psychiatrist Hans Berger published the results of his long-term research on scalp recordings of the integral bioelectrical activity of human brain. Berger coined the term «electroencephalography» and the abbreviation «EEG», characterized the basic patterns of activity, described phenomena of synchronization and desynchronization. Hans Berger legitimately went down into the history of medicine as «the father of EEG». Being a scrupulously honest scientist, Berger rightfully emphasized the impact of studies by russian physiologist Pravdich-Neminsky on «experimental electroencephalography».

Modern studies of gamma rhythm indicate that gamma activity (30–80 Hz in standard EEG), and high-frequency (80–1000 Hz) and ultra-frequency oscillations (more than 1000 Hz), recorded by ECOG, are highly informative markers of epileptic focus. Further study of high-frequency bioelectric activity of the brain is of interest to researchers and clinicians in order to improve the electroencephalographic differential diagnosis in epilepsy.

Most spirometry errors reduce test results. The aim of the study was comparison results of spirometry performed with the ATS/ERS quantitative criteria and simple visual inspection criteria. 75 patients performed spirometry twice on the same day: according to criteria of the ATS/ERS quality for spirometry and on visual control. Statistical analysis was performed with Bland-Altman method. Forced expiratory volume (FVC) and forced expiratory volume in one second (FEV1) were greater for the cases with quantitative control. The mean difference between FVCs was 0.37 ± 0.29 L. The mean difference between FEV1s was 0.06 ± 0.2 L. Using ATS/ERS spirometry guide-lines may help improve results and avoids spirometry errors.

Compression volumes oscillometry allows to measure different parameters of the central and peripheral blood circulation. For an estimation of accuracy of this method in definition of linear and volume indicators of a system hemodynamics, as referential technology, the expert doppler-echocardiography was applied. The method has shown acceptable accuracy in measurement of stroke volume (±15 %), with consistent displacement (±1,96 standard deviations) at an estimation of dependence of a difference of measurements in two ways in Bland — Altman plot. The high correlation has been revealed between oscillometric peak speed in a humeral artery and doppler peak speed in aorta (р < 0,001; r = 0,85). Similar correlation was observed between aortic Doppler- spectrum integral and the peak speed of an arterial blood-groove (р < 0,001; r = 0,68).

Currently, a number of manufacturers offer devices for self-registration of ECG and other parameters of the cardiovascular system (CVS) by patients and signal analysis using telemedicine technologies. This makes it possible to create medical services based on mobile remote monitoring. The purpose of the article: a review of existing telemedicine solutions for individual ECG recording and related mobile applications and server-side data analysis software for assessing applicability in functional diagnostics and cardiology services. The article highlights the history of the development of methods for telemedicine analysis of ECG, provides a comparative review of modern solutions for medical cardioregistration. Findings. 1. Individual ECG telemonitoring is a promising technology that is comparable in terms of diagnostic capabilities to assess cardiac rhythm disturbances with Holter ECG monitoring and multifunctional monitoring implanted with ECG loopback recorders. The main vector of development of individual ECG telemonitoring systems is related to the automation of ECG analysis both on the server side and in the patient’s mobile application, for this the application of artificial intelligence and big data (bigdata) is promising. 2. Telecardiogram of an electrocardiogram promotes closer contact of the patient and medical service at the minimum expenses of time for such interaction.

The main goal of echocardiography is not to diagnose CAD or changes associated with CAD, but to reveal non-coronary heart disease. Currently, the development of ultrasound technologies makes it possible to expand the standard echocardiography by evaluating the elastic properties of the thoracic aorta. Due to the fact that studies show correlation between the presence and severity of coronary atherosclerosis with changes in the elastic properties of the thoracic aorta, this solution improves the usefulness of echocardiography in patients with CAD. The most promising in assessing the elastic properties of the thoracic aorta during the traditional transthoracic echocardiography are tissue doppler imaging (TDI) and color M-mode. Color M-mode is a technology that is mainly used in echocardiography to assess the compliance of the left ventricle by examining the mitral inflow propagation velocity. This technology may be used in the descending part of the thoracic aorta, where it will similarly display the elastic properties.

The article highlights the current understanding of the role of standard operating procedures in the quality management system of medical organizations on the example of functional diagnostics departments with an emphasis on the activities of nursing staff. An example of a standard operating procedure is given.