On representing noise by deterministic excitations for interpreting the stochastic resonance phenomenon.

Adding noise to a system can 'improve' its dynamic behaviour, for example, it can increase its response or signal-to-noise ratio. The corresponding phenomenon, called stochastic resonance, has found numerous applications in physics, neuroscience, biology, medicine and mechanics. Replacing stochastic excitations with high-frequency ones was shown to be a viable approach to analysing several linear and nonlinear dynamic systems.

[Peculiarities of surgical treatment for true aneurysms of the popliteal artery].

A popliteal artery aneurysm is a rare disease and therefore it seems currently important to investigate peculiarities of surgical treatment of this pathology. Our study included a total of 60 patients (62 limbs) operated on for popliteal artery aneurysms with various complications. In order to assess the obtained findings the patients were subdivided into 3 groups depending on emergency of rendering surgical care.

[Two-year results of infrainguinal reconstructions using autovenous shunts and xenografts].

The authors analysed two-year results of inftrainguinal distal arterial reconstructions using xenograft ("kemAngioprosthesis") as compared with an autovein. Ours was a retrospective study including a total of 110 patients who endured 57 femoropopliteal (distal) and 54 femorotibial bypasses by means of both an autovein and a xenograft used as a shunt. The indications for reconstructive operation in the majority of cases was critical ischaemia induced by an atherosclerotic lesion of the femoropoplitealtibial segment corresponding to type D according to the TASC II classification.

[Short and medium-term variability of blood pressure in elderly patients with arterial hypertension and predicting the risk of renal dysfunction].

The aim of the work was to specifically identify short and medium variability of blood pressure (BP) in elderly patients with arterial hypertension and to evaluate the prognostic value of fluctuation of BP for the development of renal dysfunction. 64 patients with hypertension were surveyed: a core group of 33 patients with start-AG over the age of 60 years, the control group - 31 patients with uncomplicated hypertension and onset before the age of 60 years. Variability was evaluated by day, night and diurnal SBP and DBP according to the results of daily monitoring of blood pressure, as well as intra-individual (short-term) and visit-to-visit blood pressure variability (seven consecutive days) (medium-term).

[Criteria for the determination of the distance of a gunshot from limited-range firearms based on the morphological characteristics of the wound and the results of inductively coupled plasma mass spectrometry].

We have developed the criteria allowing to determine the distance of a gunshot from limited-range firearms (an IZh-79-9TGM pistol with the elastic bullet cartridges) based on the morphological characteristics of the wound and the results of inductively coupled plasma mass spectrometry. The method has been developed for the quantitative determination of barium, lead, and antimony in the targets depending on the gunshot distance.