ELETROFISIOLOGIA DO CORAO PDF

Veja grátis o arquivo eletrofisiologia cardiaca e ECG enviado para a Triângulo de Koch é uma área triangular da parede septal do átrio direito do coração. Bate- bate coração. Eletrofisiologia cardíaca. Post. por: Biom. Perf. Jonathan Tavares. Wikipedia(4 entries). edit. cawiki Electrofisiologia cardíaca; enwiki Cardiac electrophysiology; eswiki Electrofisiología cardíaca; ptwiki Eletrofisiologia do coração.

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Furthermore, the combination of adaptive meshes techniques together with numerical ro 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.

If the normal conduction pathway is interrupted,another part of the heart takes over as pacemaker. The use of ALG adaptive mesh also proved elehrofisiologia attractive because the electrical wavefront that propagates corresponds only to a small fraction of the cardiac tissue.

Eletrofisiologia do coração – Wikipédia, a enciclopédia livre

An arrhythmia may occur when: A small portion of the last part of the PR interval is represented by the conduction time through the bundle of His. The septal fascicles of the Left Bundle Branch cause the first wave of ventricular depolarization, in a left-to-right direction across the septum, creating a Q-wave in leads I and II, and an R-wave in lead III. However, the high complexity of thebiophysical processes translates into expensive computational models.

This takes place slowly, and generates a wide wave.

The use of uniform meshes leads to a high computational cost, as it requires a large number of mesh points. Normally, the electrical impulse moves through the heart’s conduction system, and the heart contracts. Wagner Corso Junior Co-orientador: Show full item record.

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Conduction accelerates through the His Bundle into the bundle branches. Rafael Sachetto Oliveira Orientador: The atria contract a fraction of a second before the ventricles so the blood empties into the ventricles before the ventricles contract. Each contraction represents one heartbeat.

For more information visit http: Under some conditions, almost all heart tissue is capable of starting a heartbeat automaticityor becoming the “pacemaker,” just like the sinus node. Rodrigo Weber dos Santos Banca: 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 coraoo loss in accuracy of numerical solution obtained.

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 eletrofisiologai fastest for the numerical solution of the parabolic partial differential equation with a speedup of 8. Conduction through the AV Node is normally slow. Wagner Meira Junior Orientador: A small portion of the last part of the PR interval is represented by the conduction time through the bundle branches.

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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. Although we achieved a significant improvement in the execution time of the cardiac electrophysiology simulations, we are far from real-time simulations. Resumo em lingue estrangeira: 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.

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eletrofisiologia cardiaca e ECG

The bundle of His divides into right and left pathways to provide electrical stimulation to both ventricles. Just below the AV node, the impulse passes through the bundle of His. Computational models have become valuable tools for the study of the electrical behavior of the heart.

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.

Conduction time through the AV node accounts for most of the duration of the PR interval. Located 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 time for the ventricles prior to ventricular contraction.

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.