AI Article Synopsis
- Intracardiac electrograms are essential for diagnosing and treating cardiac arrhythmias, but their variability can complicate interpretation.
- Simulations of these electrograms help clarify how factors like catheter position and contact affect the signals.
- In this study, simulated electrograms were validated against real recordings, showing a strong correlation in timing and signal width across various catheter orientations.
Article Abstract
Intracardiac electrograms are the key in understanding, interpretation and treatment of cardiac arrhythmias. However, electrogram morphologies are strongly variable due to catheter position, orientation and contact. Simulations of intracardiac electrograms can improve comprehension and quantification of influencing parameters and therefore reduce misinterpretations. In this study simulated intracardiac electrograms are analyzed regarding tilt angles of the catheter relative to the propagation direction, electrode tissue distances as well as clinical filter settings. Catheter signals are computed on a realistic 3D catheter geometry using bidomain simulations of cardiac electrophysiology. Thereby high conductivities of the catheter electrodes are taken into account. For validation, simulated electrograms are compared with in vivo electrograms recorded during an EP-study with direct annotation of catheter orientation and tissue contact. Good agreement was reached regarding timing and signal width of simulated and measured electrograms. Correlation was 0.92±0.07 for bipolar, 0.92±0.05 for unipolar distal and 0.80 ± 0.12 for unipolar proximal electrograms for different catheter orientations and locations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/EMBC.2013.6611133 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Diagnosis of atrial cardiomyopathy: from the electrocardiogram to the new opportunities with multimodality imaging.
J Cardiovasc Med (Hagerstown)
February 2025
Division of Cardiology, Department of Systems Medicine, Tor Vergata University, Rome.
Atrial cardiomyopathy (AC) has been defined by the European Heart Rhythm Association as "Any complex of structural, architectural, contractile, or electrophysiologic changes in the atria with the potential to produce clinically relevant manifestations".1 The left atrium (LA) plays a key role in maintaining normal cardiac function; in fact atrial dysfunction has emerged as an essential determinant of outcomes in different clinical scenarios, such as valvular diseases, heart failure (HF), coronary artery disease (CAD) and atrial fibrillation (AF). A comprehensive evaluation, both anatomical and functional, is routinely performed in cardiac imaging laboratories.
View Article and Find Full Text PDFVascular Access and Closure Management for Electrophysiological Interventions: Small Interventions Big Impact.
Curr Cardiol Rep
January 2025
Heart Division, Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK.
Purpose Of The Review: This review examines the role of vascular access and closure management in cardiac electrophysiology (EP) procedures, emphasising their impact on patient outcomes and safety. It synthesises current evidence and highlights advancements, challenges, and opportunities in this critical area of EP practice.
Recent Findings: Ultrasound-guided vascular access has significantly reduced complications and improved success rates compared to traditional methods.
Personalized Heart Digital Twins Detect Substrate Abnormalities in Scar-Dependent Ventricular Tachycardia.
Circulation
January 2025
City St. George's, University of London, UK (M.C.W., A.C.L., M.M.S.).
Background: Current outcomes from catheter ablation for scar-dependent ventricular tachycardia (VT) are limited by high recurrence rates and long procedure durations. Personalized heart digital twin technology presents a noninvasive method of predicting critical substrate in VT, and its integration into clinical VT ablation offers a promising solution. The accuracy of the predictions of digital twins to detect invasive substrate abnormalities is unknown.
View Article and Find Full Text PDFPulsed Field Ablation (PFA) is a new ablation method being rapidly adopted for treatment of atrial fibrillation, which shows advantages in safety and efficiency over radiofrequency and cryo-ablation. In this study, we used an in vivo swine model (10 healthy and 5 with chronic myocardial infarct) for ventricular PFA, collecting intracardiac electrograms, electro-anatomical maps, native T1-weighted and late gadolinium enhancement MRI, gross pathology, and histology. We used 1000-1500 V pulses, with 1-16 pulse trains to vary PFA dose.
View Article and Find Full Text PDFBeyond the usual challenges, a case of LV summit PVCs ablation in child with ASO for D-TGA.
BMC Cardiovasc Disord
December 2024
Magdi Yacoub Heart Foundation, Cairo, Egypt.
Premature ventricular contractions (PVCs) are a common finding in patients with surgically repaired congenital heart defects including transposition of the great arteries (D-TGA). While often asymptomatic, PVCs can sometimes lead to palpitations, dyspnea, and hemodynamic compromise, requiring therapeutic intervention. The arterial switch operation is the preferred treatment for D-TGA, but these patients have a 2% incidence of ventricular arrhythmias and 1% incidence of sudden cardiac death post-operatively.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!