Anatomic obstacles in cavotricuspid isthmus detected by modified 2D transthoracic echocardiography and long-term outcomes in radiofrequency ablation of typical atrial flutter.

Background: Although radiofrequency ablation of the cavotricuspid isthmus (CTI), responsible for sustaining atrial flutter, is a highly effective procedure, in extended patients' observations following this procedure, more than every tenth becomes unsuccessful. Therefore, this study aimed to provide helpful information about the anatomy of the CTI in transthoracic echocardiography, which can aid in better planning of the CTI radiofrequency ablation in patients with typical atrial flutter.

Materials And Methods: 56 patients with typical atrial flutter after radiofrequency ablation were evaluated at the end of the 24-month observation period.

Compound motor action potentials in transient and persistent phrenic nerve injury - metanalysis.

The right phrenic nerve is vulnerable to injury (PNI) during cryoballoon ablation (CBA) isolation of the right pulmonary veins. The complication can be transient or persistent. The reported incidence of PNI fluctuates from 4.

Radiofrequency catheter ablation of ventricular tachycardia using combined endocardial techniques in patients with structural heart disease improves procedural effectiveness and reduces arrhythmia episodes.

Background: Evidence indicates that radiofrequency catheter ablation (RFCA) of ventricular tachycardia (VT) in patients with structural heart disease (SHD) is safe and effective. However, arrhythmia recurrence is still relatively high, and the optimal procedural strategy is unclear. In clinical practice, several combinations of mapping and ablation techniques are used to improve VT ablation efficacy.

Prevalence of Arrhythmia in Adults after Fontan Operation.

Structural, hemodynamic, and morphological cardiac changes following Fontan operation (FO) can contribute to the development of arrhythmias and conduction disorders. Sinus node dysfunction, junction rhythms, tachyarrhythmias, and ventricular arrhythmias (VAs) are some of the commonly reported arrhythmias. Only a few studies have analyzed this condition in adults after FO.

Contact Force-Sensing versus Standard Catheters in Non-Fluoroscopic Radiofrequency Catheter Ablation of Idiopathic Outflow Tract Ventricular Arrhythmias.

Background: Adequate contact between the catheter tip and tissue is important for optimal lesion formation and, in some procedures, it has been associated with improved effectiveness and safety. We evaluated the potential benefits of contact force-sensing (CFS) catheters during non-fluoroscopic radiofrequency catheter ablation (NF-RFCA) of idiopathic ventricular arrhythmias (VAs) originating from outflow tracts (OTs).

Methods: A group of 102 patients who underwent NF-RFCA (CARTO, Biosense Webster Inc.

Left Ventricular Summit-Concept, Anatomical Structure and Clinical Significance.

The left ventricular summit (LVS) is a triangular area located at the most superior portion of the left epicardial ventricular region, surrounded by the two branches of the left coronary artery: the left anterior interventricular artery and the left circumflex artery. The triangle is bounded by the apex, septal and mitral margins and base. This review aims to provide a systematic and comprehensive anatomical description and proper terminology in the LVS region that may facilitate exchanging information among anatomists and electrophysiologists, increasing knowledge of this cardiac region.

Non-fluoroscopic radiofrequency catheter ablation of right- and left-sided ventricular arrhythmias.

Introduction: Radiofrequency catheter ablation (RFCA) is an important method of treatment of ventricular arrhythmias (VAs). In the majority of RFCA, fluoroscopy is used, exposing patients and medical staff to all related side effects. Current experience of non-fluoroscopic (NF)-RFCA in VAs from the left side is limited.

[Reasons of recurrence and subjective arrhythmia feelings after successful RF AVNRT ablation].

Unlabelled: Aim of the study was analysis of electrophysiological and clinical parameters related to increasement of recurrence risk of AVNRT and subjective heart feelings after successful RF ablation.

Materials And Methods: Retrospective analysis was made among patients after successful RF AVNRT ablation. Study group was 93 patients (F=63), mean age 46.

Vitamin K antagonists favourably modulate fibrin clot properties in patients with atrial fibrillation as early as after 3days of treatment: Relation to coagulation factors and thrombin generation.

Introduction: Atrial fibrillation (AF) increases the risk of thromboembolism that is reduced by vitamin K antagonists (VKAs). We sought to investigate changes in plasma fibrin clot phenotype at the onset of oral anticoagulation.

Materials And Methods: Forty consecutive AF patients (aged 45-83 years, CHA2DS2-VASc score 3.

Assays of fibrin network properties altered by VKAs in atrial fibrillation - importance of using an appropriate coagulation trigger.

Atrial fibrillation (AF) is a prothrombotic condition, involving increased thrombin generation and fibrinogen concentrations. Vitamin K antagonists (VKAs) prevent arterial thromboembolism if optimal anticoagulation is achieved by individualised drug doses, assessed by determining the Prothrombin time-related International Normalized Ratio (Pt-INR). There is evidence that formation of tight-laced fibrin networks is pathogenic in prothrombotic diseases.

Effectiveness of atrial versus atrioventricular pacing for sick sinus syndrome during long-term follow-up.

Background: According to the current guidelines, atrioventricular (DDD) pacing is superior to atrial pacing (AAI) in the treatment of sick sinus syndrome (SSS).

Aim: To compare outcomes of AAI and DDD pacing in patients with SSS during long-term follow-up.

Methods: We studied 809 patients, including 86 patients in the AAI group (57 women, mean age 65 ± 15 years) and 723 patients in the DDD group (406 women, mean age 71.

[Ablation of slow pathway in a patient with persistent left superior vena cava].

We describe a case of successful radiofrequency ablation of slow pathway in a 54 year-old woman with persistent left superior vena cava. The ablation was performed using anatomical approach, outside the ostium of coronary sinus.

[Evaluation of the early effectiveness and late arrhythmia recurrences subjectively experienced by the patient after RF ablation of accessory pathway in Wolf-Parkinson-White syndrome depending on it's localization and the electrical parameters of ablation--own observation].

Unlabelled: Nowadays, radiofrequency ablation (RF) is recommended treatment method of atrioventricular reentrant tachycardia associated with accessory pathway. This procedure is characterised by high early and late efficacy and low risk of complication. The aim of this study was to evaluate early effectiveness and late arrhythmia recurrences subjectively experienced by the patient after RF ablation of accessory pathway in Wolf-Parkinson-White Syndrome, depending on it's localization and the electrical parameters of ablation.

[Venous thrombosis as a complication of pacemaker implantation--own observations].

Unlabelled: Thrombosis is a fairly rare, yet dangerous complication of pacemaker implantation. It may occur in various time intervals after the actual implantation procedure. The risk factors are as follows: inflammation or injury, vein anomalies, arrhythmia, venous stenosis.