Results 21 to 30 of about 48,801 (243)
Multiscale studies of delayed afterdepolarizations I: A comparison of two biophysically realistic mathematical models for human ventricular myocytes [PDF]
arXiv, 2023 Focal arrhythmias, which arise from delayed afterdepolarizations (DADs), are observed in various pathophysiological heart conditions; these can lead to sudden cardiac death. A clear understanding of the electrophysiological factors of cardiac myocytes, which lead to DADs, can suggest pharmacological targets that can eliminate DAD-induced arrhythmias ...
arxiv
Percent ventricular pacing with managed ventricular pacing mode in standard pacemaker population [PDF]
Europace, 2008 Unnecessary right ventricular pacing has deleterious effects and becomes more significant when cumulative percent ventricular pacing (Cum%VP) exceeds 40% of time. The Managed Ventricular Pacing (MVP) mode has been shown to significantly reduce the percent ventricular pacing compared to the DDD/R mode.
Maaike Hofman +8 more
openaire +3 more sources
Sudden failure of ventricular pacing and recovery in a patient with cardiac sarcoidosis
Journal of Arrhythmia, 2017 A 76-year-old woman with sarcoidosis who had an implantable pacemaker for complete atrioventricular block was admitted with syncope. Electrocardiogram revealed ventricular pacing failure, and a marked rise in the ventricular pacing threshold.
Yosuke Terui +10 more
doaj +1 more source
Indian Pacing and Electrophysiology Journal, 2014 Right ventricular apical pacing may cause or worsen mitral regurgitation (MR). Potential mechanisms for this adverse sequelae include intraventricular dyssynchrony, altered papillary muscle function, pacing-induced cardiomyopathy with left ventricular ...
Christopher V. DeSimone, MD, PhD +5 more
doaj +1 more source
Panoramic Voltage-Sensitive Optical Mapping of Contracting Hearts using Cooperative Multi-View Motion Tracking with 12 to 24 Cameras [PDF]
arXiv, 2023 Action potential waves triggering the heart's contractions can be imaged at high spatial and temporal resolutions across the heart surface using voltage-sensitive optical mapping. However, for over three decades, optical mapping has been performed with contraction-inhibited hearts.
arxiv
Mechanisms of vortices termination in the cardiac muscle [PDF]
Roy Soc Open Science, 4: 170024, 2017, 2016 We propose a solution to a long standing problem: how to terminate multiple vortices in the heart, when the locations of their cores and their critical time windows are unknown. We scan the phases of all pinned vortices in parallel with electric field pulses (E-pulses).
arxiv +1 more source
Right Ventricular Outflow Tract Septal Pacing Is Superior to Right Ventricular Apical Pacing [PDF]
Journal of the American Heart Association, 2015 Background The effects of right ventricular apical pacing ( RVAP ) and right ventricular outflow tract ( RVOT ) septal pacing on atrial and ventricular electrophysiology have not been thoroughly compared ...
Hui Li +7 more
openaire +3 more sources
Journal of Arrhythmia, 2006 The patient was a 67-year-old female diagnosed with dilated cardiomyopathy. She had chronic atrial fibrillation (AF) with bradycardia and low left ventricular function (left ventricular ejection fraction (LVEF) 40%). She was admitted for congestive heart
Yukiko Sashida, MD +5 more
doaj +1 more source
Indeterminacy of Spatiotemporal Cardiac Alternans [PDF]
, 2007 Cardiac alternans, a beat-to-beat alternation in action potential duration (at the cellular level) or in ECG morphology (at the whole heart level), is a marker of ventricular fibrillation, a fatal heart rhythm that kills hundreds of thousands of people in the US each year.
arxiv +1 more source
Annals of Noninvasive Electrocardiology, 2022 Background Atrial pacing and right ventricular (RV) pacing are both associated with adverse outcomes among patients with first‐degree atrioventricular block (1°AVB).
Zak Loring +9 more
doaj +1 more source