Results 1 to 10 of about 256,975 (402)

Entrainment of randomly coupled oscillator networks by a pacemaker [PDF]

, 2004
Entrainment by a pacemaker, representing an element with a higher frequency, is numerically investigated for several classes of random networks which consist of identical phase oscillators. We find that the entrainment frequency window of a network decreases exponentially with its depth, defined as the mean forward distance of the elements from the ...
A. N. Zaikin, A. T. Winfree, Alexander S. Mikhailov, E. E. Abrahamson, Hiroshi Kori, M. Stich, S. C. Manrubia, S. J. Kuhlman, S. N. Dorogovtsev, Y. Kuramoto   +9 more
arxiv   +6 more sources

Delay-induced multiple stochastic resonances on scale-free neuronal networks [PDF]

Chaos 19 (2009) 023112, 2009
We study the effects of periodic subthreshold pacemaker activity and time-delayed coupling on stochastic resonance over scale-free neuronal networks. As the two extreme options, we introduce the pacemaker respectively to the neuron with the highest degree and to one of the neurons with the lowest degree within the network, but we also consider the case
Guanrong Chen, Kandel E. R., Matjaž Perc, Qingyun Wang, Wang Q. Y., Wang Q. Y., Zhisheng Duan   +6 more
arxiv   +3 more sources

Pacemaker Implantation and Dependency After Transcatheter Aortic Valve Replacement in the REPRISE III Trial

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background As transcatheter aortic valve replacement expands to younger and/or lower risk patients, the long‐term consequences of permanent pacemaker implantation are a concern.
Christopher U. Meduri, Dean J. Kereiakes, Vivek Rajagopal, Raj R. Makkar, Daniel O'Hair, Axel Linke, Ron Waksman, Vasilis Babliaros, Robert C. Stoler, Gregory J. Mishkel, David G. Rizik, Vijay S. Iyer, John Schindler, Dominic J. Allocco, Ian T. Meredith, Ted E. Feldman, Michael J. Reardon   +16 more
doaj   +2 more sources

Self-organized stable pacemakers near the onset of birhythmicity [PDF]

, 2000
General amplitude equations for reaction-diffusion systems near to the soft onset of birhythmicity described by a supercritical pitchfork-Hopf bifurcation are derived. Using these equations and applying singular perturbation theory, we show that stable autonomous pacemakers represent a generic kind of spatiotemporal patterns in such systems.
A. B. Rovinsky, A. Goldbeter, A. L. Kawczynski, A. M. Zhabotinsky, A. N. Zaikin, A. S. Mikhailov, Alexander S. Mikhailov, B. Janiaud, C. Pérez-Iratxeta, H. Kokubo, H. Sakaguchi, H.-J. Krug, J. J. Tyson, K. J. Lee, M. Alamgir, M. Assenheimer, M. Ipsen, M. Ipsen, Mads Ipsen, Michael Stich, O. Decroly, O. Nekhamkina, P. Lamba, R. J. Deissler, S. Jakubith, S. Nasuno, T. Ohta, V. A. Vasiliev, Y. A. Kuznetsov, Y. Kuramoto   +29 more
arxiv   +3 more sources

Early Pacemaker Dependency After Heart Transplantation Is Associated with Permanent Pacemaker Implantation, Graft Failure and Mortality [PDF]

Journal of Cardiovascular Development and Disease
Aims: Patients after heart transplantation (HTX) often experience post-transplant bradycardia, but little is known about the outcomes of early pacemaker dependency after HTX.
Fabrice F. Darche, Karsten M. Heil, Rasmus Rivinius, Matthias Helmschrott, Philipp Ehlermann, Norbert Frey, Ann-Kathrin Rahm   +6 more
doaj   +2 more sources

Reentrant transition in coupled noisy oscillators [PDF]

Physical Review E 91, 012901 (2015), 2015
We report on a novel type of instability observed in a noisy oscillator unidirectionally coupled to a pacemaker. Using a phase oscillator model, we find that, as the coupling strength is increased, the noisy oscillator lags behind the pacemaker more frequently and the phase slip rate increases, which may not be observed in averaged phase models such as
Kobayashi, Yasuaki, Kori, Hiroshi
arxiv   +5 more sources

Genetically engineered cardiac pacemaker: stem cells transfected with HCN2 gene and myocytes - a model [PDF]

arXiv, 2005
Artificial biological pacemakers were developed and tested in canine ventricles. Next steps will require obtaining oscillations sensitive to external regulations, and robust with respect to long term drifts of expression levels of pacemaker currents and gap junctions. We introduce mathematical models intended to be used in parallel with the experiments.
Kanani, Sandra, Krinsky, Valentine, Pumir, Alain   +2 more
arxiv   +2 more sources

Concealed malfunction of the temporary pacemaker [PDF]

Indian Pacing and Electrophysiology Journal, 2006
The 12-lead ECG shows sequential atrial and ventricular pacing (Figure 1A). A tracing, obtained simultaneously during pacemaker interrogation, disclosed pacemaker functioning as VDD mode (Figure 1B).
Mohammad Alasti, Majid Haghjoo, Abolfath Alizadeh, Mohammad Ali Sadr-Ameli   +3 more
doaj   +4 more sources

Diagnostic value of implantable loop recorders in patients with unexplained syncope or palpitations

Annals of Noninvasive Electrocardiology, 2021
Background The implantable loop recorder (ILR) is a small cardiac rhythm‐monitoring device. Our aim was to determine ILR diagnostic value in patients with unexplained syncope, presyncope, or palpitations suggesting cardiac arrhythmias.
Nikola N. Radovanović, Siniša U. Pavlović, Bratislav Kirćanski, Nemanja Branković, Nikola Vujadinović, Vojislav Sajić, Ana Milašinović, Vesna Bisenić, Mirjana Živković, Goran Milašinović   +9 more
doaj   +1 more source

SARS-CoV-2 Infection Induces Ferroptosis of Sinoatrial Node Pacemaker Cells

Circulation Research, 2022
Background: Increasing evidence suggests that cardiac arrhythmias are frequent clinical features of coronavirus disease 2019 (COVID-19). Sinus node damage may lead to bradycardia.
Yuling Han, Jiajun Zhu, Liuliu Yang, Benjamin E. Nilsson-Payant, Romulo Hurtado, Lauretta A. Lacko, Xiaolu Sun, Aravind R. Gade, Christina A. Higgins, Whitney J. Sisso, Xue Dong, Maple Wang, Zhengming Chen, D. Ho, G. Pitt, R. Schwartz, B. tenOever, T. Evans, Shuibing Chen   +18 more
semanticscholar   +1 more source