Veja grátis o arquivo Eletrofisiologia cardíaca enviado para a disciplina de Fisiologia Categoria: Anotações – Veja grátis o arquivo Aula de eletrofisiologia cardiaca e ECG enviado para a disciplina de Cardio Categoria: Aulas – 2 – Análise dos efeitos do 2,6-Diisopropilfenol sobre a eletrofisiologia cardíaca em pacientes com ectopias de via de saída ventricula. Propofol is an effective.

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Recent studies have demonstrated that this drug exerts effects on the cardiac conduction system having both pro-arrhythmic and antiarrhythmic effects in a concentration-dependent manner. Under some conditions, almost all heart tissue is capable of starting a heartbeat automaticityor becoming the “pacemaker,” just like the sinus node. However, we have not found in the literature studies on the effects of propofol on post-potency-triggered arrhythmias that represent one of the most frequent types of ventricular arrhythmias.

Programmed Electrical Stimulation in Mice. For other languages click here. 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.

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 carxiaca 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.

Diagnostic catheters were positioned in the coronary sinus, right ventricle and anteroseptal region of the tricuspid ring for atrial, ventricular and HIS potentials, respectively. Optical Mapping of Langendorff-perfused Rat Hearts.


Robotic Ablation of Atrial Fibrillation. If the problem continues, please let us know and we’ll try to help.

Aula de eletrofisiologia cardiaca e ECG

Not only will this give you access to this article but will provide you with the opportunity to access other content. Please sign in or create an account. This takes place slowly, and generates a wide wave. We recommend downloading the newest version of Flash here, eletroffisiologia we support all versions 10 and above.

Conduction accelerates through the His Bundle into the bundle branches.

Programmed Electrical Stimulation in Mice | Protocol (Translated to Portuguese)

Hi, Why this article is not access for allI really need the method but unfortunately I can not use it. Monteiro, Helena Serra Azul.

Each contraction represents one heartbeat. I hope this helps bridge the gap a little and I look forward to speaking with you soon. These variables were collected before and during the intravenous infusion of propofol aiming to achieve a target sedation titrated by bispectral index BIS between 40 and You must be signed in to post a comment. Click here for the english version.

Fill out the form below to receive a free trial or learn more about access:. Please recommend JoVE to your librarian.

Your institution must subscribe to JoVE’s Medicine section to access this content. Figura modificado a partir Mathur et al. Conduction time through the AV node accounts for most of the duration of the PR cardiacq. Close-up do cateter 1.

Unable to load video. Ten patients with ventricular outflow tract arrhythmias without structural heart disease were selected and indicated for the treatment of ablation. Just below the AV node, the impulse caridaca through the bundle of His.


The mechanisms involved in such effects remain poorly defined, but possibly involve ion channels such as sodium, calcium, and potassium as well as modulations in the autonomic nervous system.

A subscription to J o VE is required to view this article. 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. Analysis of the data presented showed that the infusion of propofol in doses titrated by the bispectral index did not seem to interfere in the Expression of ventricular arrhythmias triggered by late post-potentials when these were manifested as ventricular extrasystoles.

At baseline and under programmed atrial and ventricular pacing, data were collected from 17 seventeen cardiac electrophysiological variables: An unexpected error occurred. Hello I’d like to thank you for your interest in JoVE. Monteiro, Helena Serra Azul Format: 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.

The bundle of His divides into right and left pathways to provide electrical stimulation to both ventricles.