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Biomedical subjects

N R Paleev

Publications and source records attributed to N R Paleev.

At least 73 records · Page 4Linked to original sources
PubMed1990

[Radiocardiography and rheography of the pulmonary artery in the diagnosis of disorders of hemodynamics and right-ventricular contractility in patients with chronic obstructive bronchitis].

Radiocardiography and rheography of the pulmonary artery were used to examine impairments in hemodynamics and contractile function of the right ventricle in 40 patients with chronic obstructive bronchitis complicated with persistent hypertension. Right ventricular hemodynamic and contractile impairments were shown to be not equivalent with similar clinical and functional signs of pulmonary hypertension. This fact indicates that the use of special techniques is of practical value in the determination of right ventricular hemodynamics and myocardial contractility in patients with chronic obstructive bronchitis. Radiocardiography and rheography of the pulmonary artery are sufficiently reliable noninvasive techniques for examining the hemodynamics and contractile function of the right ventricular myocardium.

Blood Pressure↗
PubMed1990

[Ultrastructural changes in the erythrocytes irradiated with ultraviolet light].

The ultrastructure of erythrocytes of donor blood and blood of patients suffering from kidney insufficiency was studied with the help of scanning and transmission electron microscopes before and after it was treated with ultraviolet light. It was concluded that after being treated with ultraviolet light, the ultrastructure of donor blood erythrocytes undergoes significant positive changes which are being characterized by normalization of the form of cells, decrease of associative ties between them, the cytoplasm content becomes more homogenous. There was a noticeable increase of a number of discocytes and a decreased number of associative ties between the cells after the patients' own blood was treated with ultraviolet light. The violation of the wholesomeness of erythrocytes membrane was not discovered. The indications are that the observed therapeutical effect after treating blood with ultraviolet light, is explained, to a certain extent, by the ultrastructural modification of erythrocytes membrane.

Blood Donors↗
PubMed1989

[Correlation analysis of hemodynamic and morphological parameters in patients with myocarditis].

Central and intrapulmonary hemodynamic parameters were examined in 40 patients with myocarditis. Morphological evidence for endomyocardial biopsy specimens and morphometric findings were also analyzed. Deterioration of myocardial diastolic relaxation was found to closely correlate with the magnitude of cardiosclerotic changes and cardiomyocytic myolysis. A correlation was also established between the morphometric characteristics of the microcirculatory bed and the parameters of myocardial contractility. Functionally deficiently cardiomyocytic hypertrophy was more profound in severe heart failure.

Adolescent↗
PubMed1989

[Myocardial insufficiency in infectious-allergic myocarditis].

The authors analyze the results of histologic and electron-microscopic studies of 58 endomyocardial biopsy specimens, obtained from patients with infectious allergic myocarditis aged 20 to 52. Morphologic examinations have been parallelled by studies of arrhythmias in these patients. The major parameters of hemodynamics at rest and dosed exercise have been examined by the radionuclide technique. Cardiac rhythm and conductivity disorders in infectious allergic myocarditis often aggravate the course of the disease, disturb the hemodynamics, and are prognostically unfavourable signs. These disorders result from changes in the myocardial membranes, and one of the mechanisms responsible for the membranous injuries are the dystrophic processes in the nerve fibres, terminals, and receptors of the myocardium.

Adult↗
PubMed1988

[Phenomenon of a complete interventricular (interatrial) block].

In 21 cases of separate cardiac cavity excitation (20 of separate ventricular excitation (SVE) and one of separate atrial excitation), 40 right and left QRS complexes were obtained by routine, prolonged and synchronous ECG recording in various standard leads. A differential diagnosis was made between fusion QRS complexes and right and left QRS complexes. Three criteria of fusion ventricular complexes were found to be undiagnostic for right and left ventricular complexes in SVE. SVE has its own electrocardiographic criteria: (1) heterodirectional P waves or QRS complexes separated and unseparated from each other by an isoelectrical interval of less than 0.15 or less than 0.25 s, respectively; (2) in SVE, P-R interval may be no more than 0.06 s shorter than sinus P-R interval; (3) the end vector may be different from or similar to the sinus one. The basis for separate cardiac cavity excitation is functional longitudinal interatrial or interventricular blockade.

Electrocardiography↗
PubMed1988

[Clinical and pathophysiologic aspects of pulmonary hypertension].

Pulmonary hypertension (PH) is a complicated, yet poorly studied problem of modern medicine. A combined clinico-instrumental study of clinical and pathophysiologic aspects of the PH syndrome of varying origins has substantiated nosological independence of primary PH. PH associated with vasculitis, primarily affecting the lungs, is described. Differential-diagnostic criteria of primary and chronic post-embolic PH are presented. Mechanisms of PH development and progress, and those of heart failure associated with chronic pulmonary obstructive diseases and congenital heart defects are discussed. PH classifications are proposed.

Heart Defects, Congenital↗