The atria contract a fraction of a second before the ventricles so the blood empties into the ventricles eletrofiiologia the ventricles contract. Conduction time through the AV node accounts for most of the duration of the PR interval. Although we achieved a significant improvement in the execution time of the cardiac electrophysiology simulations, we are far from real-time simulations. Each contraction represents one heartbeat. If the normal conduction pathway is interrupted,another part of the heart takes over as pacemaker.

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Conduction time through the AV node accounts for most of the duration of the PR interval. Cardiac electrophysiology — Wikidata The bundle of His divides into right and left pathways to provide electrical stimulation to both ventricles. Rodrigo Weber dos Santos Banca: For more information eketrofisiologia http: An arrhythmia may occur when: The AV node slows impulse conduction, which allows time for the atria to contract and for blood to be pumped from the atria to the ventricles prior to ventricular contraction.

The use of ALG adaptive mesh also proved very attractive because the electrical wavefront that propagates corresponds only to a small fraction of the cardiac tissue. The OpenGL approach showed to be the fastest with a speedup of compared to the multicore implementation for the solution of the nonlinear system of ordinary differential equations ODEs associated to the solution of the cardiac model, whereas CUDA was the fastest elertofisiologia the numerical solution of the parabolic partial differential equation with a speedup of 8.

Although we achieved a significant improvement in the execution time of the cardiac electrophysiology simulations, we are far from real-time simulations. However, the high complexity of thebiophysical corwo translates into expensive computational models. The atrial depolarization wavefront, represented by the P-wave on the ECG, spreads initially downward in the right atrium, and ends as a primarily leftward vector in the left atrium. Furthermore, the combination of adaptive elefrofisiologia techniques together with numerical methods with adaptive time step and parallel computing using both multicore computers and GPUs proved extremely effective achieving speedups larger than x using only one machine equipped with eight cores and a GPU.

Just below the AV node, the impulse passes through the bundle of His. In this work we propose, implement and combine strategies using parallel computing and graphical processing unit GPUadaptive meshes in space and time adaptive methods in order to reduce the execution time of cardiac electrophysiology simulations.

The atria contract a fraction of a second before the ventricles so the blood empties into the ventricles before the ventricles contract. Enviado por Maria Eduarda flag Denunciar. Vorao between the Atrium and the Ventricles in the interatrial septum close to the tricuspid valve Receives the impulse from the SA Node and delivers it through the Bundle of His the forefront of the His-Purkinje network Produces rates at BPM if the SA Node fails to fire Conduction through the AV Node is slow, allowing appropriate fill eletrofisiolohia for the ventricles prior to ventricular contraction.

Each contraction represents one heartbeat. This takes place slowly, and generates a wide wave. Rafael Sachetto Oliveira Orientador: A small portion of the last part of the PR interval is represented by the conduction time through the bundle branches.

Usually, the numerical solution of the partial differential equations that model the phenomenon requires fine enough space discretizations to follow the wave front, which is about 0. Eletrofisiologla use of uniform meshes leads to a high computational cost, as it requires a large number of mesh points.

Wagner Meira Junior Co-orientador: Computational models have become valuable tools for the study of the electrical behavior of the heart. Show full item record. Conduction through the AV Node is normally slow. If the normal conduction pathway is interrupted,another part of the heart takes over as pacemaker. Related Articles

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Conduction time through the AV node accounts for most of the duration of the PR interval. Cardiac electrophysiology — Wikidata The bundle of His divides into right and left pathways to provide electrical stimulation to both ventricles. Rodrigo Weber dos Santos Banca: For more information eketrofisiologia http: An arrhythmia may occur when: The AV node slows impulse conduction, which allows time for the atria to contract and for blood to be pumped from the atria to the ventricles prior to ventricular contraction. The use of ALG adaptive mesh also proved very attractive because the electrical wavefront that propagates corresponds only to a small fraction of the cardiac tissue. The OpenGL approach showed to be the fastest with a speedup of compared to the multicore implementation for the solution of the nonlinear system of ordinary differential equations ODEs associated to the solution of the cardiac model, whereas CUDA was the fastest elertofisiologia the numerical solution of the parabolic partial differential equation with a speedup of 8. Although we achieved a significant improvement in the execution time of the cardiac electrophysiology simulations, we are far from real-time simulations. However, the high complexity of thebiophysical corwo translates into expensive computational models.

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Dagrel Just below the AV node, the impulse passes through the bundle of His. Conduction time through the AV node accounts for most of the duration of the PR interval. A small portion of the last part of the PR eletrofisioloiga is represented by the conduction time through the bundle of His. This takes place slowly, and generates a wide wave. In this sense, the tests reported in this work show that the bi-dimensional heart tissue model simulations were accelerated up to 20 times by using the adaptive mesh algorithm, with no loss in accuracy of numerical solution obtained.