Persistent left superior vena cava in a patient with an implanted dual-chamber pacing system in atrial fibrillation with tachycardia-bradycardia syndrome.

The relevance of the study is conditioned by the problem of implantation of an artificial cardiac pacemaker in atrial fibrillation in patients with tachy-brady syndrome according to the standard scheme related to the presence of a congenital anomaly, such as persistent left superior vena cava. The purpose of the study is to develop an operative method of implantation of a permanent two-chamber pacemaker in patients with tachy-brady syndrome with concomitant pathology of the persistent left superior vena cava. Research methods are the generally accepted clinical and instrumental examination of the patient, including taking anamnesis and a standard cardiological examination, electrocardiography, transthoracic echocardiography, plain radiography, angiocardiographic examination, and multispiral computed tomography, which, along with a general analysis, confirm the presence of tachy-brady syndrome with atrial fibrillation and congenital anomaly in the form of persistent left superior vena cava in patients.

Atrial fibrillation: Epidemiology, pathophysiology, and clinical complications (literature review).

The last three decades have been characterized by an exponential increase in knowledge and advances in the clinical management of atrial fibrillation. The purpose of the study is to provide an overview of the pathogenesis of nonvalvular atrial fibrillation and a comprehensive investigation of the epidemiological data associated with various risk factors for atrial fibrillation. The leading research methods are analysis and synthesis, comparison, observation, induction and deduction, and grouping method.

Comparative Effectiveness and Safety of Cryoablation Versus Radiofrequency Ablation Treatments for Persistent Atrial Fibrillation.

The purpose of this study was to compare the effectiveness and safety of 2 strategies for catheter treatment of patients with persistent atrial fibrillation in the long-term period, using cardiac implantable loop recorders. The research is a prospective, randomized, controlled study designed to compare the results of modern catheter technologies in patients with persistent atrial fibrillation. The study included 127 patients with persistent atrial fibrillation in the last 6 months before inclusion in the study, for whom at least 2 antiarrhythmic drugs of class I to III were not effective.

Efficacy and Safety Results of Different Ablation Technologies for Persistent Atrial Fibrillation Treatment.

Introduction: Pulmonary vein isolation is the primary goal in treating patients with paroxysmal atrial fibrillation using catheter ablation. This study's purpose is a comparative assessment of the efficacy and safety of two strategies for catheter treatment in patients with persistent atrial fibrillation.

Patients And Methods: The study included 127 patients with persistent atrial fibrillation during the last six months before inclusion in the study.

The efficacy and safety of cryoballoon catheter ablation in patients with paroxysmal atrial fibrillation.

Background: Electrical isolation of pulmonary vein ostia is an established therapy for paroxysmal atrial fibrillation.

Aims: The purpose of this study is to evaluate the long-term efficacy and safety of cryoballoon catheter ablation in paroxysmal atrial fibrillation with normal anatomy of the left atrium.

Methods: Two hundred fifteen consecutive patients were included in the study (from November 2014 to November 2016).

Prediction of arrhythmia recurrence after atrial fibrillation ablation in patients with normal anatomy of the left atrium.

Background: Enlarged left atrium is an established predictor of atrial fibrillation recurrence after pulmonary vein isolation but arrhythmia recurrence is also observed in patients with normal anatomy of the left atrium. The aim of the study is to evaluate arrhythmia recurrence predictors in patients with normal anatomy of the left atrium.

Methods: The study included 182 patients with normal anatomy of the left atrium who underwent pulmonary vein isolation using catheter ablation.