[The prostanoid system in patients with disordered heart rhythm].
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Biomedical subjects
Publications and source records attributed to E I Mitchenko.
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In the aim of determining an electrophysiologic effect of disopyramide and metoprolol at alone therapy and in combination in patients with supraventricular tachycardia on the background of Wolff-Parkinson-White syndrome 23 persons were examined. All patients were subjected to an intracardiac electrophysiological testing; in its process metoprolol in the dosage of 0.2 mg/kg of body weight, disopyramide in the dosage of 2 mg/kg per body weight both separately and in combination were controlled. It was identified that metoprolol and disopyramide are an effective antiarrhythmic preparates applied for arresting and prevention of reciprocating orthodromic tachycardias in patients with Wolff-Parkinson-White syndrome.
Having analyzed the electrophysiological mechanisms and state of humoral regulatory substances in 87 patients with paroxysmal disorders of the cardiac rhythm the authors determined the antiarrhythmic action of two beta-blockaders: obsidan and metoprolol. They found a reduction of the sinus node function under the effect of obsidan and to a lesser degree under the effect of metoprolol. Metoprolol produced a high antiarrhythmic effect, particularly in supraventricular tachycardias with participation of abnormal conduction pathways.
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Amino acid composition of proteins from antigen preparations of the human heart conduction system has been studied. Differences in amino acid composition and relative affinity of the structure of two groups were found: between the sinus and atrioventricular nodes, the His bundle and contractile myocardium.