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Biomedical subjects

A D Levant

Publications and source records attributed to A D Levant.

At least 19 recordsLinked to original sources
PubMed1990

[Surgical treatment of tachycardia in children].

Based on the outcomes of surgical treatment in 127 children suffering from tachycardias, three clinical groups were identified: Group 1: an uncomplicated course; Group 2: tachycardias concurrent with congenital heart disease; Group 3: life-threatening tachyarrhythmias. The results of surgical treatment were the following by the groups: Group 1 showed its efficacy in 96.5% and a tachycardial relapse in 3.5%, Group 2 displayed it in 81.0%, deaths in 19.0%, Group 3 exhibited it in 93%, deaths in 7%. In the surgical treatment of the Wolff-Parkinson-White syndrome, the method of choice is epicardial fulguration of the accessory atrioventricular pathway (100% versus 89.4% for the W. Sealy procedure).

Adolescent↗
PubMed1986

[Surgical treatment of rhythm disorders with simultaneous correction of heart valve defects].

Twenty-five patients (14 males and 11 females aged 11 to 45 years) with rhythm disorders and valvular defects were operated on. Supraventricular paroxysmal tachycardia was the most common of rhythm disorders occurring in 15 cases, with Ebstein's anomaly in 11, mitral valve incompetence in 2, combined mitral defects in 1 and aortic stenosis in 1 of those. Atrial fibrillation was recorded in 7 patients, with Ebstein's anomaly in 2, mitral stenosis in 2, mitral incompetence in 2 and mitral prolapse in 1 of those. Nodal tachycardia was found in 1 patients with Ebstein's anomaly and in 1 patient with mitral valve incompetence. Left-ventricular tachycardia was diagnosed in a female patient with mitral prolapse. The operations were simultaneous and comprised two steps; they were performed under extracorporeal circulation and drug- and cold-induced cardioplegia, with the elimination (surgical interruption) of accessory conduction pathways or removal of arrhythmogenic areas as the first step, and reconstructive surgery on heart valves as the second step.

Adolescent↗
PubMed1984

[Exercise tolerance in evaluating the efficacy of continuous electrocardiostimulation in patients with atrioventricular block].

Fifty-three patients with brady-cardia were examined prior to and 1 year after the implantation of the cardiostimulator. It was found that the bicycle ergometric test was not contraindicated in examining the function of the respiration and circulation in patients with stable forms of bradyarrhythmia. Three types of the body's response to exercise were identified. It was shown that in patients with the third type of response the compensatory possibilities of the respiratory and cardiovascular systems were at the breaking point. The authors believe that electrocardiostimulation in them is of a doubtful value in terms of improving the quality of life and restoring the capacity for work. Implantation of cardiostimulators in such patients is mostly necessary in the presence of Morgagni-Edems-Stokes attacks.

Blood Pressure↗
PubMed1984

[Epicardial mapping in the syndrome of premature ventricular excitation. 2].

Epicardial mapping was carried out in 20 patients suffering from Wolff-Parkinson-White's syndrome with supraventricular tachycardias resistant to drug therapy. The automated mapping system elaborated at the A.N. Bakulev Cardiovascular Surgery Institute and a modified method of epicardial mapping made it possible to radically eliminate additional routes of conduction in 91% of cases.

Adult↗
PubMed1980

[Threshold characteristics of cardiac excitability on electrical stimulation].

Threshold characteristics of excitability of the myocardium stimulated by electric current were studied in experiments on frogs. It was established that the magnitude of threshold charge is the main constant characterizing myocardial excitability. A convenient method was suggested for its measurement. It allows an accurate charge measuring at any voltage and current. The results obtained can be used for an optimal make up of the outlet cascade of implanted cardiostimulators.

Animals↗
PubMed1975

[Principles of early postoperative management of patients after open-heart surgery].

Proceeding from their personal 5-years experience comprising over 1500 operations with extracorporeal circulation the authors formulate their tactics of the early postoperative therapy. The attention is mainly paid to the maintenance of the optimum pulmonary gas exchange, adequate haemodynamics and stable homeostasis. An important role belongs to prolonged artificial pulmonary ventilation that was used for therapeutic purposed in 324 cases of cardiac and respiratory insufficiency and for preventive purposes--in 908 patients. The therapeutic tactics for various forms of respiratory and cardiac insufficiency and multiform cardiac rhythm disorders is presented in detail. On the example of 149 patients shows that a moderately incomplete blood replacement in the postoperative period does not result in clearsut anaemia. The authors recommend donor blood transfusions when the hemoglobin level is below 10 Gm%.

Arteriovenous Shunt, Surgical↗