Results 61 to 70 of about 98,015 (277)

Amplitude equation approach to spatiotemporal dynamics of cardiac alternans [PDF]

, 2006
Amplitude equations are derived that describe the spatiotemporal dynamics of cardiac alternans during periodic pacing of one- and two-dimensional homogeneous tissue and one-dimensional anatomical reentry in a ring of homogeneous tissue. These equations provide a simple physical understanding of arrhythmogenic patterns of period-doubling oscillations of
arxiv   +1 more source

Learning cardiac activation maps from 12-lead ECG with multi-fidelity Bayesian optimization on manifolds [PDF]

arXiv, 2022
We propose a method for identifying an ectopic activation in the heart non-invasively. Ectopic activity in the heart can trigger deadly arrhythmias. The localization of the ectopic foci or earliest activation sites (EASs) is therefore a critical information for cardiologists in deciding the optimal treatment.
arxiv  

Left Bundle Branch Pacing in Transthyretin Cardiac Amyloidosis and Alternating Bundle Branch Block

JACC: Case Reports, 2020
Progressive conduction system disease affects patients with transthyretin cardiac amyloidosis, often requiring permanent pacing as the His-Purkinje system is affected. We present a case of left bundle branch pacing in a patient with transthyretin cardiac
Taha Ahmed, MD, Samra Haroon Lodhi, MBBS, Hassan Lak, MD, Jae Lee, MD, Mazen Hanna, MD, Roy Chung, MD   +5 more
doaj  

Cardiac Resynchronization Therapy Using Quadripolar Versus Non‐Quadripolar Left Ventricular Leads Programmed to Biventricular Pacing With Single‐Site Left Ventricular Pacing:Impact on Survival and Heart Failure Hospitalization [PDF]

, 2017
Background: In cardiac resynchronization therapy (CRT), quadripolar (QUAD) left ventricular (LV) leads are less prone to postoperative complications than non‐QUAD leads. Some studies have suggested better clinical outcomes.
Acquaye, Edmund, Ferrante, Gaetano, Leyva, Francisco, Marshall, Howard, Qiu, Tian, Walton, Jamie, Zegard, Abbasin   +6 more
core   +1 more source

Review of data types and model dimensionality for cardiac DTI SMS-related artefact removal [PDF]

arXiv, 2022
As diffusion tensor imaging (DTI) gains popularity in cardiac imaging due to its unique ability to non-invasively assess the cardiac microstructure, deep learning-based Artificial Intelligence is becoming a crucial tool in mitigating some of its drawbacks, such as the long scan times.
arxiv  

Mechanisms of Vein of Marshall-Related Tachyarrhythmias and the Impact of Ethanol Infusion

Reviews in Cardiovascular Medicine
The Ligament of Marshall (LOM) is a remnant of the embryonic sinus venosus and the left cardinal vein, containing a combination of fat, fibrous tissue, blood vessels, muscle bundles, nerve fibers, and ganglia.
Masateru Takigawa, Claire Martin, Pierre Jaïs   +2 more
doaj   +1 more source

Dual-site right ventricular pacing. A rescue alternative in cardiac resynchronisation therapy implantation failure? More efficient stimulation for patients with borderline cardiac resynchronisation therapy indication? Less harmful ventricular pacing? [PDF]

, 2007
Permanent cardiac pacing is nowadays a widespread method for the cure of conduction system diseases, improving quality of life and often saving patients’ lives.
Gułaj, Marcin, Kutarski, Andrzej, Sodolski, Tomasz   +2 more
core   +1 more source

Leave-one-out prediction error of systolic arterial pressure time series under paced breathing [PDF]

, 2004
In this paper we show that different physiological states and pathological conditions may be characterized in terms of predictability of time series signals from the underlying biological system. In particular we consider systolic arterial pressure time series from healthy subjects and Chronic Heart Failure patients, undergoing paced respiration.
arxiv   +1 more source

Durability of pulmonary vein isolation following cryoballoon ablation: Lessons from a large series of repeat ablation procedures

International Journal of Cardiology: Heart & Vasculature, 2022
Introduction: The second-generation cryoballoon (CB) has emerged in the last decade as an effective treatment for atrial fibrillation (AF). This study sought to analyze the rate of PV reconnection following CB ablation, evaluate the most frequent PV ...
Giacomo Mugnai, Federico Cecchini, Erwin Stroker, Gaetano Paparella, Saverio Iacopino, Juan Sieira, Yves De Greef, Luca Tomasi, Bruna Bolzan, Gezim Bala, Ingrid Overeinder, Alexandre Almorad, Anais Gauthey, Antonio Sorgente, Flavio Luciano Ribichini, Carlo de Asmundis, Gian-Battista Chierchia   +16 more
doaj  

Terminating ventricular tachycardia by pacing induced dynamical inhomogeneities in the reentry circuit [PDF]

arXiv, 2004
Formation of feedback loops of excitation waves (reentrant circuit) around non-conducting ventricular scar tissue is a common cause of lethal cardiac arrhythmias, such as ventricular tachycardia. This is typically treated by rapid stimulation from an implantable device (ICD). However, the mechanisms of reentry termination success and, more importantly,
arxiv