Publications by authors named "Alexey Tsyganov"
Article Synopsis
- Researchers developed a new method to create two-dimensional VCT MXenes from the VAlC MAX phase, utilizing a combination of combustion synthesis and hydrothermal processing with HCl/LiF.
- The resulting VCT MXene was characterized using various techniques, and then mixed into a poly(vinylidene fluoride) (PVDF) matrix to form nanocomposites with varying VCT content (2.5 to 20 wt%).
- The study found that adding 20 wt% VCT MXene significantly boosted the permittivity of the nanocomposite to 425.3, and the dielectric properties were primarily influenced by the PVDF matrix, with the VCT filler enhancing interfacial polarization as temperature and
Article Synopsis
- * The TiAlC precursor is synthesized using an accessible molten salt method, which lowers temperatures and creates an antioxidant environment for better material quality.
- * TiCT MXene film electrodes, produced without binders using a scalable blade coating method, show promising electrochemical performance, achieving a high specific capacity of 480 F/g in 1M HSO electrolyte, making them suitable for next-gen supercapacitors.
Three-phase polymer composites are promising materials for creating electronic device components. The qualitative and quantitative composition of such composites has a significant effect on their functional, in particular dielectric properties. In this study, ceramic filler KNiTiO (KNTO) with Ag coating as conductive additive (0.
View Article and Find Full Text PDFIn this study, we report the effect of intercalation of dimethyl sulfoxide (DMSO) and urea molecules into the interlayer space of TiCT MXene on the dielectric properties of poly(vinylidene fluoride) (PVDF)/MXene polymer nanocomposites. MXenes were obtained by a simple hydrothermal method using TiAlC and a mixture of HCl and KF, and they were then intercalated with DMSO and urea molecules to improve the exfoliation of the layers. Then, nanocomposites based on a PVDF matrix loading of 5-30 wt.
View Article and Find Full Text PDFArticle Synopsis
- - The study investigates how the distance between the left ventricular pacing site (LVPS) and the latest electrically activated site (LEAS) affects the response to cardiac resynchronization therapy (CRT) in heart failure patients using non-invasive mapping techniques.
- - Researchers analyzed data from 111 patients, finding that a shorter distance (dp) between the LVPS and LEAS was associated with a higher likelihood of CRT response—67% of patients showed significant improvement after treatment.
- - Findings indicate that dp of 47 mm can effectively differentiate between responders and non-responders, highlighting the potential of using electrical mapping to optimize LV lead placement and enhance CRT outcomes.
New three-phase composites, destined for application as dielectrics in the manufacturing of passive elements of flexible electronics, and based on polymer (PVDF) matrix filled with powdered ceramics of the hollandite-like (KFTO(H)) structure (5.0; 7.5; 15; 30 vol.
View Article and Find Full Text PDFIn this work, polymer matrix composites with the compositions PTFE/KFTO(H) and PTFE/KFTO(H)@CB and with filler volume fractions of 2.5, 5.0, 7.
View Article and Find Full Text PDFPolymer matrix composites based on ED-20 epoxy resin, hollandite K(NiTi)O and carbon nanotubes with a variable content of 0.107; 0.213 and 0.
View Article and Find Full Text PDFNonfluoroscopic catheter ablation of paroxysmal atrial fibrillation.
Pacing Clin Electrophysiol
June 2018
Aims: Radiofrequency catheter ablation of atrial fibrillation (AF) is one of the most complex ablation procedures. Both patients and operators are exposed to scattered radiation. This study evaluated the safety and efficacy of intracardiac echo (ICE)-guided pulmonary vein isolation (PVI) without fluoroscopy.
View Article and Find Full Text PDFArticle Synopsis
- A new noninvasive electrophysiology system called NEEES helps identify electrical activity in patients with atrial fibrillation but lacks comparisons with traditional invasive methods.
- Six male patients with persistent atrial fibrillation underwent both noninvasive cardiac mapping using NEEES and invasive mapping with a catheter to evaluate the consistency of findings.
- Results showed a very high correlation between the two methods in detecting electrical rotors, suggesting that NEEES could accurately replicate results of invasive mapping without the need for more invasive procedures.
Article Synopsis
- The study evaluated a new noninvasive system called NEEES for mapping ventricular arrhythmias in patients with various types of cardiomyopathy.
- Eight patients (average age 50) underwent mapping, with some having ischemic heart conditions and others nonischemic, using body-surface ECGs and CT scans.
- Results showed that the NEEES effectively identified macro-reentrant circuits in patients with heart scar, while those without scar exhibited different arrhythmia patterns involving rotor activity and wavelets.
Background: Recent studies have suggested that para-Hisian atrial tachycardia (AT) can be successfully ablated from the right atrium (RA), left atrium (LA), or noncoronary cusp (NCC) in the aorta; however, the best approach remains unclear.
Objective: This study aimed to compare different approaches to radiofrequency catheter ablation (RFCA) of para-Hisian AT.
Methods: We retrospectively analyzed 68 consecutive patients (49[72%] women; mean age 61 ± 13 years) treated with RFCA for this type of AT.
Background: The underlying mechanisms of Brugada syndrome (BrS) are not completely understood. Recent studies provided evidence that the electrophysiological substrate, leading to electrocardiogram abnormalities and/or ventricular arrhythmias, is located in the right ventricular outflow tract (RVOT). The purpose of this study was to examine abnormalities of epicardial and endocardial local unipolar electrograms by simultaneous noninvasive mapping in patients with BrS.
View Article and Find Full Text PDFAims: The aim of the present study was to estimate the accuracy of a novel non-invasive epicardial and endocardial electrophysiology system (NEEES) for mapping ectopic ventricular depolarizations.
Methods And Results: The study enrolled 20 patients with monomorphic premature ventricular contractions (PVCs) or ventricular tachycardia (VT). All patients underwent pre-procedural computed tomography or magnetic resonance imaging of the heart and torso.
Anatomical predictors for successful pulmonary vein isolation using balloon-based technologies in atrial fibrillation.
J Interv Card Electrophysiol
December 2015
Purpose: We evaluated the correlation between pulmonary venous (PV) anatomy and acute and long-term success of PV isolation (PVI) with two balloon-based ablation catheter techniques.
Methods: One hundred consecutive patients were analyzed in two equal groups treated with either the second-generation cryoballoon (CRYO) catheter or the visually guided laser ablation (VGLA) catheter. All patients underwent multi-detector computed tomography (CT) imaging.