The functional condition of left atrium during the endovascular treatment of atrial fibrillation

The atrial fibrillation causes structural and functional changes of atriums. In this case, the remodeling of left atrium increases the risk of AF. One of the treatment strategy is catheter isolation of the pulmonary veins. However, the effectiveness of these operations does not exceed 70% in most of the cases that may be due to remodeling of left atrium. In this regard, the assessment of the condition of left atrium is actual for the optimization of treatment tactics and improvement of effectiveness rate.Фибрилляция предсердий вызывает структурные и функциональные изменения предсердий. При этом ремоделирование левого предсердия увеличивает риск возникновения ФП. Одна из стратегий лечения - катетерная изоляция легочных вен. Однако эффективность данных операций в большинстве случаев не превышает 70%, что может быть обусловлено, в том числе, ремоделированием левого предсердия. В связи с этим, актуальна оценка состояния левого предсердия для оптимизации тактики лечения и улучшения показателей эффективности

CRYOBALLOON ABLATION IN RUSSIAN SITES OF INTERVENTIONAL ATRIAL FIBRILLATION MANAGEMENT TREATMENT: RESULTS OF THE FIRST NATIONWIDE SURVEY

Aim. The results of cryoballoon ablation (CBA) are known from the studies performed in the experienced centers of catheter treatment of atrial fibrillation (AF). The current study presents the results of CBA in real practice in centers with various experienceMaterial and methods. Among 62 Russian sites performing catheter treatment of AF, in 15 the CBA methods were in use to isolate pulmonary veins, in the years 2012-2014. Centers staff were surveyed for the detailed description of all performed CBA till 10.2014. The questionnaire included 74 lines about the centers experience, patients properties and ablation procedures, management of patients and complications. At the second step the questionnaire was used about complications.Results. Thirteen centers provided full data on all patients with CBA (457 procedures; 94% for paroxysmal AF; >95% CBAs in Russia). Six centers were marked as highly experienced for CBA for AF (mean 414,2±339,4 ablations for AF per year), and 7 — with lesser experience (33,2±34,3 ablations for AF per year). Ten centers provided the results of 6/12 month observation, and 11 centers — detalization of the complications data. there were no statistically significant differences in arrhythmia absence in patients from both types of centers (61,9±10,0 versus 61,3±30,4%). Serious complications developed in 1,5% of patients (4 tamponades, 2 strokes and 1 diaphragmal nerve palsy) and were similarly spread among more and less experienced centers (1,4% vs. 2%, p>0,05). Minor adverse events (vascular, transient diaphragm nerve palsy, transient hemoptysis) were found in 37 (8%) patients and were more common in more experienced (teaching) centers. Overall frequency of adverse events and of vascular events was higher in females than males (12% and 4,9% vs. 6% and 0%, resp.; p<0,05).Conclusion. In the real clinical practice CBA is performed with acceptable efficacy and moderate frequency of adverse events development. In less experienced centers of catheter treatment of AF the prevalence of serious adverse events does not differ from less experienced. Women develop vascular complications more often

Желудочковая экстрасистолия у детей

The article presents updated data on the problem of premature ventricular contractions in children based on the clinical guidelines of the Russian Society of Cardiology and the Union of Pediatricians of Russia for the diagnosis, treatment and management of pediatric patients with premature ventricular contraction. The issues of diagnosis and treatment based on the principles of evidence-based medicine as well as important aspects of prevention of exacerbations and follow-up have been clarified in detail. The criteria for assessing the quality of care for patients with premature ventricular contractions have been presented.CONFLICT OF INTEREST. Not declared.В статье изложены обновленные данные о проблеме желудочковых экстрасистолий у детей, основанные на клинических рекомендациях Ассоциации детских кардиологов России и Союза педиатров России по диагностике, лечению и ведению пациентов детского возраста с желудочковой экстрасистолией. Подробно освещены вопросы диагностики, лечения, основанные на принципах доказательной медицины, а также важные аспекты профилактики обострений болезни и диспансерного наблюдения. Отображены критерии оценки качества медицинской помощи пациентам с желудочковыми экстрасистолиями.Публикация является обновленным вариантом клинических рекомендаций Ассоциации детских кардиологов России и Союза педиатров России по диагностике, лечению и ведению пациентов детского возраста с желудочковой экстрасистолией, опубликованных на сайте https://medi.ru/klinicheskie-rekomendatsii/zheludochkovaya-ekstrasistoliya-u-detej_14366/Авторы подтверждают отсутствие конфликта интересов, который необходимо обнародовать

Ventricular arrhythmias. Ventricular tachycardias and sudden cardiac death. 2020 Clinical guidelines

Russian Society of Cardiology (RSC).With the participation of Russian Scientific Society of Clinical Electrophysiology, Arrhythmology and Cardiac Pacing, Russian Association of Pediatric Cardiologists, Society for Holter Monitoring and Noninvasive Electrocardiology.Approved by the Scientific and Practical Council of the Russian Ministry of Health

Syncope in children with hypertrophic cardiomyopathy

Seventy children aged 7 to 17 years with hypertrophic cardiomyopathy (HCM) were examined; among them there were 11 syncope patients and 5 presyncope patients. The screening program included standard electrocardiography (ECG), Doppler echocardiogra-phy, 24-hour Holter ECG monitoring, and an incremental exercise testing (Bruce treadmill test). The markers of myocardial electrical instability were determined. In the children with HCM, syncope was established to be heterogeneous; it had an arrhythmogenic origin and, in most cases, occurred in the presence of tachyarrhythmia (44%) or bradyarrythmia (25%); its vasovagal genesis was probable in one third of the examinees. The children with syncope were typified by the asymmetric, obstructive form of HCM, at the same tone there was most commonly left ventricular hypertrophy concurrent with left atrial enlargement. 24-hour Holter monitoring showed that bradycardia was prevalent in the patients, 3 patients were found to have more than 2-second cardiac rhythm pauses caused by second-degree atrioventricular block in 1 case or by sick sinus syndrome in 2. Nonsustained ventricular tachycardia was noted in two patients. The children with syncope were typified by the signs of myocardial electrical instability as a reduction in the early phase of heart rate turbulence and by impaired QT/RR interval adaptation as hyperadaptation. The paper presents the developed management tactics for children with syncope and indications for the implantation of a cardioverter defibrillator, a pacemaker, or an ECG loop recorder

An algorithm for topical electrocardiographic diagnosis of ventricular arrhythmias in children

To develop a topical diagnostic algorithm, the authors analyzed surface ECG in 243 children, including 139 boys, with ventricular arrhythmia. The children’s age was 5 to 17 years (mean 13.4±3.1 years). The found ECG features were compared with the results of endocardial mapping and radiofrequency ablation. Based on the most informative criteria, the authors developed an algorithm for the ECG diagnosis of ventricular arrhythmias in children, which could locate the arrhythmia focus prior to interventional treatment. The most informative electrocardiographic characteristics for the topical diagnosis of ventricular arrhythmias in children were the morphology of the QRS complex in lead V1 and its duration in lead V2. The morphology of the QRS complex in lead I, its duration in lead II, the amplitude of the R wave in lead III, and the ratio of R/S wave amplitudes in lead V3 were proposed to be used as additional characteristics. The algorithm for the ECG diagnosis of ventricular arrhythmias in children makes it possible to assume the localization of the arrhythmogenic focus with an accuracy of 90% and to carry out a directed endocardial mapping, which reduces the duration of radiofrequency ablation and the radiological burden sustained by the child and the staff

Premature Ventricular Contraction in Children

The article presents updated data on the problem of premature ventricular contractions in children based on the clinical guidelines of the Russian Society of Cardiology and the Union of Pediatricians of Russia for the diagnosis, treatment and management of pediatric patients with premature ventricular contraction. The issues of diagnosis and treatment based on the principles of evidence-based medicine as well as important aspects of prevention of exacerbations and follow-up have been clarified in detail. The criteria for assessing the quality of care for patients with premature ventricular contractions have been presented.CONFLICT OF INTEREST. Not declared

Outcomes of Cryoballoon Ablation in High-and Low-Volume Atrial Fibrillation Ablation Centres: A Russian Pilot Survey

properly cited. Purpose. The results of cryoballoon ablation (CBA) procedure have been mainly derived from studies conducted in experienced atrial fibrillation (AF) ablation centres. Here, we report on CBA efficacy and complications resulting from real practice of this procedure at both high-and low-volume centres. Methods. Among 62 Russian centres performing AF ablation, 15 (24%) used CBA technology for pulmonary vein isolation. The centres were asked to provide a detailed description of all CBA procedures performed and complications, if encountered. Results. Thirteen sites completed interviews on all CBAs in their centres (>95% of CBAs in Russia). Six sites were high-volume AF ablation (>100 AF cases/year) centres, and 7 were low-volume AF ablation. There was no statistical difference in arrhythmia-free rates between high-and low-volume centres (64.6 versus 60.8% at 6 months). Major complications developed in 1.5% of patients and were equally distributed between high-and low-volume centres. Minor procedurerelated events were encountered in 8% of patients and were more prevalent in high-volume centres. Total event and vascular access site event rates were higher in women than in men. Conclusions. CBA has an acceptable efficacy profile in real practice. In less experienced AF ablation centres, the major complication rate is equal to that in high-volume centres

Outcomes of Cryoballoon Ablation in High- and Low-Volume Atrial Fibrillation Ablation Centres: A Russian Pilot Survey

Purpose. The results of cryoballoon ablation (CBA) procedure have been mainly derived from studies conducted in experienced atrial fibrillation (AF) ablation centres. Here, we report on CBA efficacy and complications resulting from real practice of this procedure at both high- and low-volume centres. Methods. Among 62 Russian centres performing AF ablation, 15 (24%) used CBA technology for pulmonary vein isolation. The centres were asked to provide a detailed description of all CBA procedures performed and complications, if encountered. Results. Thirteen sites completed interviews on all CBAs in their centres (>95% of CBAs in Russia). Six sites were high-volume AF ablation (>100 AF cases/year) centres, and 7 were low-volume AF ablation. There was no statistical difference in arrhythmia-free rates between high- and low-volume centres (64.6 versus 60.8% at 6 months). Major complications developed in 1.5% of patients and were equally distributed between high- and low-volume centres. Minor procedure-related events were encountered in 8% of patients and were more prevalent in high-volume centres. Total event and vascular access site event rates were higher in women than in men. Conclusions. CBA has an acceptable efficacy profile in real practice. In less experienced AF ablation centres, the major complication rate is equal to that in high-volume centres