[Is monomorphic arrhythmia monomorphic?].

It is known that the properties of myocardium affect ECG. We studied the dependence of some ECG characteristics on the threshold of excitation by means of mathematical modeling of monomorphic arrhythmias in a homogeneous two-dimensional excitable medium. We found that monomorphic arrhythmias appear at both decreased and increased values of the excitation threshold, but there are some differences between ECG characteristics for such cases.

[Comparative characterization of changes in visual perception after ketamine and brietal anesthesia in children].

Visual perception is disordered in children aged 10-15 years subjected to surgery under ketamine and brietal anesthesia in an outpatient setting. Psychological testing was carried out during 24 h after intervention. Results of the Rorschach's test indicate that ketamine impairs the quality of visual perception (inadequate evaluation of the size, shape, velocity, etc.

[(252)Cf-plasma desorption mass spectra of bacterial oligosaccharides].

252Cf plasma desorption mass spectrometry on a "reflect" desorption instrument (MSBX) was used to study oligosaccharides from bacterial O-specific antigenic chains. The data obtained for galacturonic acid, neutral and aminouronic oligosaccharides are discussed. This method is suggested for determining the composition of oligosaccharides from the O-specific polysaccharides and for elucidating their structures after modifications.

[Anesthesiological support during reconstructive surgery of the upper lip and palate in children].

Two thousand cases of anesthesiological support during reconstructive facial surgery in children aged from 1 to 15 have been reviewed. Gas exchange, heart rate, hemodynamics and neurological status have been assessed. The most frequent and severe complications have been outlined.