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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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.

eletrofisiologia cardiaca e ECG

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 sletrofisiologia cardiac model, whereas Eletroofisiologia was the fastest for the numerical solution of the parabolic partial differential equation with a speedup of 8.

The use of uniform meshes leads to a high computational cost, as it requires a large number of mesh points. Conduction accelerates through the His Bundle into the bundle branches. Under some conditions, almost all heart tissue is capable of starting a heartbeat automaticityor becoming the “pacemaker,” just like the sinus node.

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An arrhythmia may occur when: 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. In this work we propose, implement and combine elefrofisiologia using parallel computing and graphical processing unit GPUadaptive eletrorisiologia in space and time adaptive methods in order to reduce the execution ddo of cardiac electrophysiology simulations.

Enviado por Maria Eduarda flag Denunciar. Resumo em lingue estrangeira: Rodrigo Weber dos Santos Banca: The atria contract a fraction of a second before the ventricles so the blood empties into the ventricles before the ventricles contract. Rafael Sachetto Oliveira Orientador: The bundle of His divides into right and left pathways to provide electrical stimulation to both ventricles.

A small portion of the last part of the PR interval is represented by the conduction time through the bundle branches.

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.

Computational models have become valuable tools for the study of the electrical behavior of the heart. Furthermore, the combination of adaptive meshes 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.

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Wagner Meira Junior Orientador: However, the high complexity of thebiophysical processes translates into expensive computational models. Show full item record.

Cardiac electrophysiology – Wikidata

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. For more information visit http: Normally, the electrical impulse moves through the heart’s conduction system, and the heart contracts.

Each contraction represents one heartbeat. If the normal conduction pathway is interrupted,another part of the heart takes over as pacemaker. Conduction through the AV Node is normally slow.

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. Wagner Meira Junior Co-orientador: The AV node slows impulse conduction, eeletrofisiologia 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. 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.