Cyclic peroxides and related initiating systems for radical polymerization of methyl methacrylate

Cyclic peroxides as initiators for the radical polymerization of methyl methacrylate were proposed. The initial rates, initiation rates, and effective activation energies of polymerization initiated by cyclic peroxides and cyclic peroxide-1-pyridyl-2-ferrocene systems were determined. The radical yields to the volume upon the thermal decomposition of cyclic peroxides and their catalytic decomposition in the presence of 1-pyridyl-2-ferrocene were determined. In combination with 1-pyridyl-2-ferrocene cyclic peroxides form efficient initiating systems favoring an increase in the polymerization rate, a decrease in the molecular weights, and an increase in syndiotacticity of the synthesized poly(methyl methacrylate). © 2013 Springer Science+Business Media New York

The experience of radiofrequency ablation of atrial tachycardia focus with the use of high-density myocardial mapping

The article presents a case of successful treatment of focal atrial tachycardia by radiofrequency ablation using high-density myocardial mapping. The aim of the work was to evaluate the possibilities of high-resolution myocardial mapping by EnsitePrecision® navigation system in the treatment of complex arrhythmias. The analysis of clinical data and results of electrophysiological examination of a 29-year-old patient with continuous recurrent focal atrial tachycardia was carried out. The patient was admitted with complaints of heart rate disorders and frequent short attacks of palpitations. According to electrocardiography, frequent short paroxysms of focal atrial tachycardia were revealed. The patient was taken for electrophysiological examination and radiofrequency ablation of the focus of atrial tachycardia. The focus of atrial tachycardia was located in the anterior septal part of the left atrium, which is a rare localization. After radiofrequency ablation tachycardia was terminated, no complications and recurrences were registered. The patient was discharged with the sinus rhythm. Navigation system EnsitePrecision® enables conducting high-density myocardial mapping, which helps to accurately determine the localization of the source of tachycardia. The radiation load on the patient and ablation time are reduced, which reduces the frequency of complications from the procedure

Интегральная модель диагностики и наблюдения больных саркоидозом в современных условия

The aim of the work performed was to develop a modern model of diagnosis and observation of sacroidosis patients. We examined 144 patients, and sarcoidosis was diagnosed in 109 of them. Each the third case of sarcoidosis was histologically verified. The phthysiatric facilities played the leading role in detecting sarcoidosis-like diseases and definition of the patients' contagiosity. The diagnosis of sarcoidosis and topic detection of injured organs require a complex examination in a modern diagnostic centre including various specialists' consultations. Such approach allows to assess a real spread of the disease, a rate of extrapuimonary lesions and efficacy of different therapeutic methods. The authors propose to create a national consensus on sarcoidosis.Задачей работы была отработка современной модели диагностики и наблюдения за больными саркоидозом. Были обследованы 144 пациента, у которых в 109 был подтвержден саркоидоз. В каждом третьем случае была проведена гистологическая верификация диагноза. В раннем выявлении состояний, сходных с саркоидозом, и исключения контагиозности пациентов при дальнейшем обследовании ведущая роль была отведена фтизиатрической службе. Верификация диагноза и топическая диагностика поражения органов и систем при саркоидозе требует комплексного обследования в условиях современного диагностического центра с привлечением специалистов различного профиля. Это позволит оценить реальную распространенность саркоидоза, частоту внелегочных поражений и эффективность различных методов лечения. Авторы предлагают приступить к выработке национального соглашения по данному заболеванию

THE USAGE OF TRIMETAZIDINE AND SULODEXIL TO PREVENT TRANSFORMATION OF A NON-Q MI INTO A Q-MI

In main group 104 patients of Q-myocardial infarction were treated during the first 7 days of the moment it entered a hospital by trimetazidine and sulodexide combine with the traditional treatment (nytroconnection, aspirin, beta- adrenoblocators). In control group 130 patients were treated only by traditional treatments. The blood of 62 patients from main group and 65 patients from control group was examined on thrombin’s time, partly activated tromboplastine’s time and thrombocite aggregation in dynamics three times in the first, the third and the 7-th days of observation. There were undergoing daily ECG-monitoring on Cholter. The results of treatments were valued in both groups according the number of patients with Q-myocardial infarction, average daily frequency of attacks angina pectoris, the number and duration of episodes painless myocardial ishemic, changes of parameter of hemostasis. It was exposed, that in main group Q-myocardial infarction was developed only in 2,9% patients and in 14,6% patients in control group. The average daily frequency of attacks of angina pectoris, the number of episodes of painless myocardial ishemic and their duration in main group were nearly 2 times less them in control group. It was accompanied by improvement hemostasis in main group. Thus, trimetazidine and sulodexide promote the prophylaxis Q-myocardial infarction

COMPARATIVE EFFECTIVENESS OF DIFFERENT DRUG COMBINATIONS IN REGARD TO END-POINT INCIDENCE DURING POST-INFARCTION PERIOD

In total, 316 patients with Q wave myocardial infarction (MI) were randomised into three groups. For six months after hospital discharge, 103 patients from the control group received standard therapy (aspirin, enalapril, metoprolol, and simvastatin). Group 1 (n=103) also received trimetazidine, and Group 2 (n=206) was administered ramipril, carvedilol, and trimetazidine. The end-point incidence was assessed during the two-year follow-up period (repeat MI, unstable angina, death, and the combination of these end-points). The Group 2 therapy (ramipril, carvedilol, and trimetazidine) was the most effective in terms of the end-point incidence reduction. The effectiveness of the Group 1 treatment (enalapril, metoprolol, and trimetazidine) was slightly lower, while the control group therapy (standard treatment, plus enalapril and metoprolol) was the least effective

Advantages of dynamic bi-directional applanation tonometry in primary open-angle glaucoma diagnostics

Purpose. To study tonometry parameters features, measured by different methods, taking into account individual morphometric eye parameters and biomechanical properties of the corneoscleral shell in patients with the initial and the advanced stages of primary open angle glaucoma (POAG).Material and methods. 51 patients (99 eyes) aged 48–82, with the initial (45 eyes) and advanced stages (54 eyes) of POAG were examined. The control group consisted of 31 patients (62 eyes) aged 47–83 without ophthalmic pathology. In addition to standard ophthalmologic examination, tonometry was performed using the Ocular Response Analyzer (ORA, Reichert Inc., the USA).Results. The main tonometry parameters of ORA revealed significant differences between POAG patients and the control group. No significant difference in the central corneal thickness (CCT) was found between the POAG and the control group. Patients with I and II stages of glaucoma taken separately showed differences in CCT and tonometry parameters.Conclusion. Dynamic bi-directional applanation tonometry enables to take into account the changes in viscoelastic properties of the corneoscleral eye shell, and definitely has diagnostic advantages in examining patients with various stages of POAG

Pharmaceutical therapy programme for remodeling heart prevention after Q-wave myocardial infarction

In 445 patients after Q-wave myocardial infarction, Q-IM (mean age 54,3 years; 433 men, 12 women), echocardiography parameters of left ventricular (LV) remodeling were examined after the discharge, 6 and 12 months later. Sphericity index, systolic myocardial stress and relative heart wall thickness parameters were calculated. All patients were randomized into three intervention groups: Group I (n=87) received standard therapy (metoprolol, aspirin, statins, other medications if necessary); plus enalapril and trimetazidine; Group II (n=105) - trimetazidine; Group III (n=108) - enalapril. Control group (n=145), receiving standard therapy only, was matched by gender, age, and myocardial damage type. Six months later, echocardiography LV remodeling parameters improved in all three intervention groups (especially in trimetazidine plus enalapril group), remaining unchanged in the control group. One year later, LV remodeling parameters did not differ significantly from the baseline ones

Lung ultrasound in optimizing management of patients with heart failure: current status and future prospects

The review discusses the prognostic value and contribution to therapy optimization of lung ultrasound for heart failure patients