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Vol 2, No 23 (2018): Modern Functional Diagnostics
View or download the full issue PDF (Russian)
6-12 437
Abstract
The lecture presents modern data on electroencephalographic pattern features of juvenile myoclonic epilepsy should include atypical morphology of complexes of spike-slow wave, amplitude asymmetry, focal discharges, focal onset seizures, focal displacement of the paroxysms, and the presence of generalized paroxysmal fast rhythms. Modern studies indicated the need for training of doctors of functional diagnostics and clinical neurophysiologists about the electroencephalographic characteristics of JME with the goal of timely disease diagnosis, exception the appointment of inadequate treatment.
13-17 764
Abstract
Whole-body plethysmography - the lung function test that allows to measure of thoracic gas volume (TGV), vital capacity, total lung capacity (TLC), residual volume and airway resistance. The method is based on the relationship between pressure (P) and volume (V) at constant temperature of a fixed quantity of gas: P*V = constant under isothermal conditions (Boyle-Mariotte’s Law). Clinical benefit of body plethysmography is the definition of restrictive lung disease at the presence of a reduced TLC and obstructive lung disease at the presence of abnormally increased lung volumes: RV, RV/TLC and TGV. Interpretation of lung volumes is based on comparisons of data measured in individual patient with reference (predicted) values based on healthy subjects. Normative values for lung volumes in adults have been reported by American Thoracic Society and European Respiratory Society in 2005 (ATS/ERS, 2005). Whole-body plethysmography provides the unique clinically relevant information, allows to estimate pulmonary mechanical parameters, carry out the differential diagnosis, control the course of the disease.
18-22 263
Abstract
The aim of the study is to evaluate the changes in hemodynamic parameters in patients on different patterns of ventricular activation: electrostimulation of the right ventricle or during the own cardiac rhythm. Hemodynamic parameters were studied by echocardiography and high-precision oscillometry on the brachial artery in sinus node weakness syndrome patients without signs of heart failure. The time of isovolytic contraction of the left ventricle decreases (LV dp / dt) at electrostimulation of the ventricles. The decrease of peripheral arteries compliance was also recorded on the background of stimulation in patients with interventricular dyssynchrony (an increase of interventricular mechanical delay more than 40 ms according to echocardiography).
23-28 328
Abstract
Aim: to evaluate the relationship between myocardial function and mitral valve insufficiency in patients with IE. Materials and methods.196 patients with valve IE aged from 18 to 84 years (mean age 59.3±2.1 years); men (65%), women (35%) who entered the clinic for surgical treatment were Analyzed. IE emerged against the background of the initial rheumatic heart valve disease in 68 (34.7 %) cases, congenital malformation of the valve apparatus (systemic degenerative diseases of connective tissue, bivalve aortic valve) - in 101 (51.3 %), without previous pathology in 27 (14 %). The study included transthoracic (TTE) and transesophageal echocardiography (TEE) on the devices of expert class (Vivid E 9, 33 Toshiba, Siemens, 2000) with a scanning frequency of 2.4 to 5.5 MHz. The study was based on one-dimensional, two-dimensional and Doppler echocardiography was efficient, including impulsebuy, postanovochnogo, color and fabric techniques, as well as vector analysis of the displacement speeds of the myocardium, a diagram of «flow-volume» rate of change of volume (dVol/dt) during the cardiac cycle in the software package Multivox. Results. The Sensitivity of Echocardiography in detecting IE of prosthetic valves varies widely and the average is 67 %, with raspisanii echocardiography 89 %. False positive results diagnostic vegetaci are observed in the gap of the valves, isolation of the chord, myxomatosis degeneration of the valves etc. Hemodynamic disorders is determined not only by the severity of valve regurgitation, comprising an average of 30-35 % of the value of the stroke output but the state of the LV myocardium. Vector analysis and diagram method revealed that the rate of change in the volume of LV in both systole and diastole is statistically significantly higher in patients with MN on the background of IE before surgery compared with the norm. At the same time, the rate of change in the length (dL/dt (s)) of LV in systole or diastole is practically no different from the norm. Adequate surgical correction of MN is accompanied not only by a decrease in BW and CSR of the left ventricle, but also by normalization dVol/dt, reaching almost normal values (p<0.01). Summary. TEE significantly exceeds the sensitivity of TTE echocardiography in the diagnosis of para-anular valve abscesses, vegetations in secondary ie native and prosthetic heart valves, as well as small - sized vegetations-less than 2 mm. Timely evaluation of myocardial function in IE with failure of MC on the rate of change of the volume in systole (dVol/dt’s) and ejection fraction allows with high probability to assess the risk and efficacy of surgical correction of pathology.
29-32 514
Abstract
The introduction of digital medicine and development of medical information systems requiring automated workplaces have enabled effective and quick therapeutic and diagnostic procedures. The paper describes original software used in cardiovascular and respiratory function tests, as well as methods used to archive protocols of other functional tests that may be utilized before purchasing a complete medical information system. The introduction of a hospital functional diagnostician’s automated workplace into clinical practice has resulted in a 74 % increase in the productivity of the hospital’s Functional Diagnostics Department personnel.
33-39 290
Abstract
A normal electrocardiogram (ECG) of rest does not exclude cardiovascular changes and does not allow one to unambiguously judge the functional state of the cardiovascular system (CVS). In addition, the functional status of CVS can be assessed using heart rate variability (HRV) analysis. 184 people were examined to study the efficacy of the traditional ECG analysis of rest in comparison with HRV analysis in the screening of coronaiy heart disease (CHD) and arterial hypertension (AH). Of them, without diagnosis of CHD and / or AH - 85 people. All were followed by a resting ECG in 12 leads with traditional contour analysis, HRV analysis in (tshorh> 5-minute ECG areas with background recording and during an active orthostatic test (AOT). Verification of cardiovascular diseases (CVD) was carried out using Holter 24-hour ECG monitoring, 24-hour blood pressure monitoring, echocardiography, ultrasound examination of blood vessels. 116 patients according to the in-depth examination had signs of CHD and / or AH. But only 38 people out of 116 had signs of CHD and AH on the resting ECG (myocardial ischemia, left ventricular hypertrophy, rhythm disturbances). Out of 68 patients with no signs of CHD and / or AH, 56 patients did not have resting ECG changes indicative of these diagnoses. Thus, the sensitivity and specificity of the traditional ECG analysis of rest were 33 % and 82 %, respectively. Applying the methods of statistics to the study group, we developed a decision rule based on HRV indicators, which allows us to determine the order of the examination for the exclusion of CHD and / or AH with a sensitivity of 72 % and a specificity of 72 %. So the sensitivity of the resting ECG analysis of rest (33 %) in detecting signs of CHD and / or AH is significantly lower in comparison with the received rule (72 %). At the same time, the specificity of the ECG was greatest, therefore, to improve the effectiveness of screening for CHD and / or AH, it is advisable to supplement the resting ECG with HRV parameters.
41-44 249
Abstract
The article presents results of evaluation of technical, operational and consumer properties of the well-known caps with common connector for recording of clinical EEG on the territory of the Russian Federation and Europe: Electro-cap, MCScap and WaveGuard connect.
45-50 311
Abstract
In this review article based on Russian and international printed resources we highlight current perceptions of mechanisms, types and role of ventricular ectopic activity in the structure of heart beat disorder. Approximately 5 % of the population have been registered to suffer from ventricular arrhythmia. In some cases it shows no symptoms. In terms of clinical relevance ventricular arrhythmia can be either benign and not causing any discomfort to patients life or life threatening and leading to fatal heart beat disorders (ventricular flutter or fibrillation). Life threatening ventricular arrhythmia in most cases is linked to comorbidity in cardio-vascularsystem. Ventricular tachy-arrhythmia is often a predictor of a sudden cardiac death. It is sometimes enough to register ECG to diagnose ventricular arrhythmia. The nurse in department of functional diagnostics though should know the signs of ventricular ectopic activity and be able to react efficiently to the showing of this pathology.


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ISSN 2078-5631 (Print)
ISSN 2949-2807 (Online)