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Ara es mostren els items 112-125 de 125

    • Phase-2 reentry in cardiac tissue: role of the slow calcium pulse 

      Rodríguez Cantalapiedra, Inma; Peñaranda Ayllón, Angelina; Echebarría Domínguez, Blas; Bragard, Jean (2010-07-13)
      Article
      Accés obert
      Phase-2 re-entry is thought to underlie many causes of idiopathic ventricular arrhythmias as, for instance, those occurring in Brugada syndrome. In this paper, we study under which circumstances a region of depolarized tissue ...

    • Problemas 

      Agea Tomás, José; Álvarez Casado, Enrique; Auguet Sangrá, Carlota E.; Castellví Gironès, Pedro Juan; Alva, Aleix; Echebarría Domínguez, Blas; Lacasta Palacio, Ana María; Niubó Eslava, Maria; Peñaranda Ayllón, Angelina; Ramírez de la Piscina Millán, Laureano; Rodríguez Cantalapiedra, Inma; Camí Babra, Enric (Universitat Politècnica de Catalunya, 2010-09)
      Problema, exercici
      Accés obert

    • Propagation malfunctions due to gap junction dysregulation 

      Rodríguez Cantalapiedra, Inma; Peñaranda Ayllón, Angelina; Echebarría Domínguez, Blas (2014)
      Comunicació de congrés
      Accés obert
      Gap junctions are membrane channels that connect the cytoplasm of adjacent cells allowing the cell-to-cell electrical coupling necessary for action potential propagation. Pathological conditions, such as malformations in ...

    • Propagation malfunctions due to gap junction dysregulation 

      Rodríguez Cantalapiedra, Inma; Peñaranda Ayllón, Angelina; Echebarría Domínguez, Blas (2015-01-02)
      Article
      Accés obert
      Gap junctions are membrane channels that connect the cytoplasm of adjacent cells allowing the cell-to-cell elec- trical coupling necessary for action potential propagation. Pathological conditions, such as malformations ...

    • Reexcitation mechanisms in epicardial tissue: role of Ito density heterogeneities and INa inactivation kinetics 

      Rodríguez Cantalapiedra, Inma; Peñaranda Ayllón, Angelina; Mont Girbau, Lluís; Brugada Terradellas, Josep; Echebarría Domínguez, Blas (2009-08-18)
      Article
      Accés restringit per política de l'editorial

    • Sideband instabilities and defects of quasipatterns 

      Echebarría Domínguez, Blas; Riecke, Hermann (2001)
      Article
      Accés obert
      Quasipatterns have been found in dissipative systems ranging from Faraday waves in vertically vibrated fluid layers to nonlinear optics. We describe the dynamics of octagonal, decagonal and dodecagonal quasipatterns by ...

    • Slow pulse due to calcium current induces phase-2 reentry in heterogeneous tissue 

      Peñaranda Ayllón, Angelina; Rodríguez Cantalapiedra, Inma; Echebarría Domínguez, Blas (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Phase-2 reentry is a basic mechanism for the transition to VT and VF in the heart. It is thought to underly many causes of idiopathic ventricular arrhythmias as, for instance, those occurring in Brugada syndrome. ...

    • Slow pulse due to calcium current induces phase-2 reentry in heterogeneous tissue 

      Rodríguez Cantalapiedra, Inma; Peñaranda Ayllón, Angelina; Echebarría Domínguez, Blas (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-16)
      Comunicació de congrés
      Accés obert
      Phase-2 reentry is a basic mechanism for the transition to VT and VF in the heart. It is thought to underly many causes of idiopathic ventricular arrhythmias as, for instance, those occurring in Brugada syndrome. Reentry ...

    • Spatial distribution of calcium sparks determines their ability to induce afterdepolarizations in human atrial myocytes 

      Tarifa Lora, Carmen; Vallmitjana Lees, Alexander; Jiménez Sábado, Verónica; Marchena Angos, Miquel; Llach, Anna; Herraiz Martínez, Adela; Nolla Colomer, Carme; Ginel Iglesias, Antonino; Montiel Dacosta, José Antonio; Ciruela, Francisco; Echebarría Domínguez, Blas; Benítez Iglesias, Raúl; Cinca Cuscullola, Juan Maria; Hove-Madsen, Leif (Elsevier, 2023-01)
      Article
      Accés obert
      Analysis of the spatio-temporal distribution of calcium sparks showed a preferential increase in sparks near the sarcolemma in atrial myocytes from patients with atrial fibrillation (AF), linked to higher ryanodine receptor ...

    • Spatiotemporal control of cardiac alternans 

      Echebarría Domínguez, Blas; Karma, Alain (Institute of Physics (IOP), 2002)
      Article
      Accés restringit per política de l'editorial
      Electrical alternans are believed to be linked to the onset of life-threatening ventricular arrhythmias and sudden cardiac death. Recent studies have shown that alternans can be suppressed temporally by dynamic feedback ...

    • Stability of oscillating hexagons in rotating convection 

      Echebarría Domínguez, Blas; Riecke, Hermann (2000)
      Article
      Accés obert
      Breaking the chiral symmetry, rotation induces a secondary Hopf bifurcation in weakly nonlinear hexagon patterns which gives rise to oscillating hexagons. We study the stability of the oscillating hexagons using three ...

    • Supernormal conduction in cardiac tissue promotes concordant alternans and action potential bunching 

      Echebarría Domínguez, Blas; Roeder, Georg; Engel, Harald; Davidsen, Joern; Baer, Markus (2011-04-04)
      Article
      Accés obert
      Supernormal conduction (SNC) in excitable cardiac tissue refers to an increase of pulse (or action potential) velocity with decreasing distance to the preceding pulse. Here we employ a simple ionic model to study the ...

    • Two-variable nullcline analysis of ionic general equilibrium predicts calcium homeostasis in ventricular myocytes 

      Conesa Ortega, David; Echebarría Domínguez, Blas; Peñaranda Ayllón, Angelina; Rodríguez Cantalapiedra, Inma; Shiferaw, Yohannes; Álvarez Lacalle, Enrique (2020-06-01)
      Article de premsa
      Accés obert
      Ventricular contraction is roughly proportional to the amount of calcium released from the Sarcoplasmic Reticulum (SR) during systole. While it is rather straightforward to measure calcium levels and contractibility under ...

    • Using high-resolution voltage maps to predict “redo” in the treatment of atrial fibrillation (AF) 

      Bragard, Jean; Moriones, Leire; Echebarría Domínguez, Blas; Ravassa, Susana; Ibero, Javier; García Bolao, Ignacio (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      The aim of this work is to use biomarkers extracted from high-resolution voltage maps of atrial fibrillation (AF) patients in order to make predictions about future “redo” procedures. We collected maps of the left atrium ...