[Cryodestruction of the atrioventricular bundle (bundle of His)].
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Adolescent↗
Biomedical subjects
R I Liakas
Publications and source records attributed to R I Liakas.
[Organization of the hypothalamo-amygdalar system in rats].
In acute experiments on rabbits, the ascending influences of phylogenetically different parts of hypothalamus on different nuclei of amygdala were studied with the aid of EP method. In mammals a certain type of organization of hypothalamic ascending connections with amygdala was found. It was shown that phylogenetically ancient--anterior--parts of hypothalamus are projected mainly onto the oldest (cortico--medial) division of amygdala, which is the olfactory center of the forebrain. On the other hand, phylogenetically younger nuclei of hypothalamus are functionally connected with young parts of amygdala (basolateral division) which are the important regulatory component of limbic system. The properties of functional organization of hypothalamic--amygdaloid system of integration in rabbits are discussed.
Amygdala↗
[The structuro-functional interrelationships between the hypothalamus and the dorsal and ventral hippocampus in rabbits].
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Animals↗
[The effect of calypsol, thiopental sodium and fentanyl on the functional status of the sinoatrial node and the heart conduction system in patients with paroxysmal arrhythmias].
64 patients with paroxysmal arrhythmias caused in 44 cases by collateral atrioventricular pathways have been studied. Endocardial programmed electrical cardiostimulation was applied. It has been established that calypsol at a dose of 2 mg/kg significantly improves the functional state of the sinoatrial node, atrioventricular conduction and conduction in collateral atrioventricular pathways functioning both anterogradely and retrogradely. Fentanyl, already at a dose of 2.5 micrograms/kg inhibits considerably the functional state of the sinoatrial node, without affecting conduction in the normal AV system and in collateral atrioventricular pathways. Thiopental sodium at a dose of 7 mg/kg improves slightly the functional state of the sinoatrial node.
Adolescent↗
[Electrodes for epicardial electrical mapping].
Medical-technical characteristics of electrodes for epicardial mapping are examined. Most electrodes are bipolar. The differences between them lies either in the contact configuration or in the fixation mode. The dependence of biosignal amplitude and shape on the contact orientation with respect to the direction of excitation spread is described. Free from this dependence are electrodes with a central point contact and a ring contact through the periphery Clinging and screw-in electrodes are useful for long-term monitoring while stick and suction electrodes are recommended for short-term recording from multiple sites. Ring electrodes put on a finger are advantageous in hardly accessible zones.
Electrocardiography↗