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Biomedical subjects

N V Korneev

Publications and source records attributed to N V Korneev.

At least 19 recordsLinked to original sources
PubMed1999

[Transesophageal echocardiography in diagnosis of infectious endocarditis].

Transthoracic and transesophagal echocardiography (TT EChG and TE EChG) were performed in 43 patients with infectious endocarditis (IE). Sensitivity and specificity of TE EChG in detection of vegetations were higher (92 and 75%, 81 and 50% for TE EChG and TT EChG, respectively). Vegetations and thromboembolism were unrelated. With TE EChG, morphologically verified perforations of valvular cusps were revealed 3 times more frequently than with TT EChG. Along with detection of vegetations and dysfunction of the prosthetic valve, an essential diagnostic marker of IE of the artificial valve is visualization of paraprosthetic fistulas in 2 of 5 patients. Indications for TT and TE EChG and techniques of their performance are described. TT EChG is used in screening for IE. TE EChG is conducted in complications of IE.

Adolescent↗
PubMed1993

[The use of echocardiography in examining patients with unstable stenocardia].

The report presents the results of EchoCG study in 81 patients with unstable stenocardia admitted in 6-24 hours from the onslaught pain. With the help of EchoCG the myocardial contractile function was defined and the segmental kinetics of left ventricular wall was registered with respect to four variants of unstable stenocardia courses: stenocardia occurred for the first time, progressive stenocardia, variational stenocardia and postmyocardial infarction stenocardia. During the EchoCG examination at the moment of anginal attack the significant increase in left ventricular end-diastolic volume and end-systolic volume and decrease of total ejection fraction were noted. Also, not infrequently the zones of dyskinesia are recorded indicative of ischemia of these segments, which commonly have transient character. With the progress of myocardial ischemia the abnormalities of left ventricular diastolic fraction appear which are determined with the help of Doppler-EchoCG. Thus, the use of EchoCG in diagnostics of patients with unstable stenocardia allows more reliably to define the degree of myocardial changes.

Adult↗
PubMed1992

[The mechanisms of the development and diagnosis of myocardial infarct in septic endocarditis].

Based on the clinical, instrumental and biochemical findings, out of 104 patients with septic endocarditis 11 (10.6%) were diagnosed to have myocardial infarction. It was provoked by coronary artery embolism, the covering of the coronary artery ostium by vegetation from the aortal cusp, a decrease of perfusion pressure in atherosclerosis stenosed coronary arteries because of marked insufficiency of the aortal cusp. In more than half the cases, the clinical picture of myocardial infarction was atypical, painless. Echocardiographic demonstration of the vegetations near the coronary artery ostium permits forecasting the possibility of its covering with vegetation, the threat of the occurrence of acute coronary insufficiency, which may appear an additional indication for heart valve replacement.

Adolescent↗
PubMed1991

[Prolonged cardioselective blockade of beta-1 adrenoreceptors in combination with increased diuresis as a method of choice in the treatment of hypertension].

The clinical effects of Tenoric, a long-acting combined drug (atenolol and chlorthalidone in a tablet), were studied in 31 patients with Stages I and II hypertensive disease, by using echocardiography, daily automatic blood pressure monitoring, bicycle ergometry, measurements of plasma renin and aldosterone. The drug was found to be highly clinically effective in labile and sustained hypertension. When given once or twice a day, it makes it possible to reliably monitor blood pressure, improve hemodynamic parameters, as reflected by lower cardiac output and decreased peripheral vascular resistance, reduce the estimated mass of the left myocardium, alleviate a pressor response to exercise and enhance its tolerance, lower plasma renin levels. The side effects of the drug are minimal and include moderate bradycardia. Peripheral vasospasm and systemic weakness were observed in single cases. There were no atherogenic changes in lipid spectrum and disturbed glucose and uric acid metabolism during the drug therapy.

Adult↗
PubMed1987

[Differential echocardiographic diagnosis of a giant left atrium and pericardial effusion].

With a sharp increase in the sizes of the left atrium its wall in the form of a fold can be seen behind the left ventricle. An echo-free space is recorded in such cases on echocardiograms. It can be interpreted as pericardial exudate. Proceeding from an analysis of the results of ultrasonic investigation of 5 patients the authors have proposed some criteria for differential diagnosis between the gigantic left atrium and pericardial effusion.

Adult↗
PubMed1986

[Features of the course and evaluation of the efficacy of surgical treatment of adhesive pericarditis with constriction].

Two groups of patients with constrictive pericarditis were identified on the basis of clinical and instrumental examination including echocardiography and computerized tomography of the heart: patients with complete obliteration of the pericardial sac and constriction, and those with exudative/adhesive pericarditis and constriction. Part of the patients were subjected to subtotal pericardectomy. An improvement of left-ventricular diastolic function and hemodynamic parameters was demonstrated 1 to 1.5 months after the operation. Postoperative echocardiography showed persistent disorders of interventricular septum movement and multilayer abnormal echoes in the left-ventricular posterior wall area.

Adult↗
PubMed1985

[Importance of ultrasonic studies in diagnosing and assessing heart function in aortic coarctation in adults].

Aortic coarctation was diagnosed with the aid of sectorial scanning from the suprasternal position in 6 of 7 patients. Ultrasonic investigation allows one to assess myocardial status and detect a prolapse of the atrioventricular valves, aortal valve protrusion, the presence of a bicuspid aortal valve and other abnormalities accompanying aortic coarctation in adult patients.

Adolescent↗
PubMed1985

[Recognition and differential diagnosis of pericardial and left-sided pleural effusions based on data from uni- and 2-dimensional echocardiography].

Sixty patients with pericardial and left-side effusions were singled out of 317 patients with pericarditis. A possibility to differentiate the position of liquid in adjacent cavities by means of one- and two-dimension echocardiography was shown. Peculiarities in the position of liquid with relation to the heart and one another lay in the basis of differential diagnosis. The use of simple technical methods in one-dimension echocardiography and the use of the two-dimension study make it possible to diagnose reliably pleural and pericardial effusions and their combination.

Adolescent↗