نتایج جستجو برای: cardiac electrophysiology
تعداد نتایج: 282123 فیلتر نتایج به سال:
Case Presentation No. 1 A 52-year-old man was referred for recurrent palpitations after 2 prior electrophysiology studies and ablations at an outside institution targeting right anteroseptal and left posterolateral accessory pathways (AP) for orthodromic reentrant tachycardia (ORT). Baseline ECG revealed sinus rhythm without preexcitation and an incomplete right bundle branch block. An ECG from...
The ablation of atrial fibrillation (AF) is an area of intense research in cardiac electrophysiology. In this review, we discuss the development of catheter-based interventions for AF ablation. We outline the pathophysiologic and anatomic bases for ablative lesion sets and the evolution of various catheter designs for the delivery of radiofrequency (RF), cryothermal, and other ablative energy s...
One of the most recent trends in cardiac electrophysiology is the development of integrative anatomically accurate models of the heart, which include description of cardiac activity from sub-cellular and cellular level to the level of the whole organ. In order to construct this type of model, a researcher needs to collect a wide range of information from books and journal articles on various as...
Mark S. Link, MD, FACC, FHRS, Chair, Derek V. Exner, MD, MPH, FHRS, Mark Anderson, MD, PhD, Michael Ackerman, MD, PhD, Amin Al-Ahmad, MD, FHRS, Bradley P. Knight, MD, FHRS, Steven M. Markowitz, MD, Elizabeth S. Kaufman, MD, FHRS, David Haines, MD, FACC, FHRS, Samuel J. Asirvatham, MD, David J. Callans, MD, J. Paul Mounsey, BM BCh, PhD, Frank Bogun, MD, Sanjiv M. Narayan, MD, PhD, FHRS, Andrew D...
Case Presentation A 60-year-old man with a history of remote myocarditis and residual mild left ventricular dysfunction presented with syncope. Before admission, the patient was not taking any regular medications. Medical history was otherwise unremarkable. Examination at presentation was unremarkable, apart from slow atrial fibrillation (AF). ECG on presentation demonstrated AF with slow ventr...
The last 2 decades have seen major advances in clinical electrophysiology, particularly with ablation of complex arrhythmias and the use of implantable devices. Throughout, the main method by which trainees learn continues to be from direct interaction with practicing electrophysiologists. Most of us learned the basic rules for interpreting ECGs and electrograms during “teaching rounds,” where ...
INTRODUCTION Multiple cardiac ion channels are prone to block by pharmaceutical compounds, and this can have large implications for cardiac safety. The effect of a compound on individual ion currents can now be measured in automated patch clamp screening assays. In-silico action potential models are proposed as one way of predicting the integrated compound effects on whole-cell electrophysiolog...
The field of cardiac electrophysiology tries to abstract, describe and finally model the electrical characteristics a heartbeat. With recent advances in electrophysiology, models have become more powerful descriptive as ever. However, advance inverse electrophysiological modeling, i.e. creating from measurements such ECG, less investigated smoothness simulated ECGs w.r.t. parameters need be fur...
We discuss the application of the spectral element method to the monodomain and bidomain equations describing propagation of cardiac action potential. Models of cardiac electrophysiology consist of a system of partial differential equations coupled with a system of ordinary differential equations representing cell membrane dynamics. The solution of these equations requires solving multiple leng...
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