ParkinsonCanadaV1, Main, Exploration, bibRecord, 004823

In vitro and in vivo effects within the coronary sinus of nonarcing an arcing shocks using a new system of low-energy DC ablation

Identifieur interne : 004823 ( Main/Exploration ); précédent : 004822; suivant : 004824

In vitro and in vivo effects within the coronary sinus of nonarcing an arcing shocks using a new system of low-energy DC ablation

Auteurs : R. Lemery ; TACK KI LEUNG ; E. Lavellee ; A. Girard ; M. Takajic ; D. Roy ; M. Montpetit

Source :

Circulation : (New York) [ 0009-7322 ] ; 1991.

RBID : Pascal:91-0387302

Descripteurs français

Pascal (Inist)
- Ablation, Cathéter, Sinus coronaire, Chien, Energie électrique, Wolff Parkinson White syndrome, Trouble conduction, Trouble excitabilité, Appareil circulatoire pathologie, Exploration, Traitement, Animal, Etude expérimentale, Anatomopathologie, Trouble rythme cardiaque.

English descriptors

KwdEn :
- Ablation, Animal, Animals, Arrhythmia, Arrhythmias, Cardiac (surgery), Cardiac Tamponade (prevention & control), Cardiovascular disease, Catheter, Conduction disorder, Coronary Vessels (surgery), Coronary sinus, Dog, Dogs, Electric energy, Electrocoagulation (methods), Excitability disorder, Experimental study, Exploration, Female, Heart Conduction System (surgery), Heart Rupture (prevention & control), Male, Models, Cardiovascular, Models, Structural, Pathology, Treatment, Wolff Parkinson White syndrome, Wolff-Parkinson-White Syndrome (surgery).
MESH :
- methods : Electrocoagulation.
- prevention & control : Cardiac Tamponade, Heart Rupture.
- surgery : Arrhythmias, Cardiac, Coronary Vessels, Heart Conduction System, Wolff-Parkinson-White Syndrome.
- Animals, Dogs, Female, Male, Models, Cardiovascular, Models, Structural.

Abstract

This system includes 1) a low-energy ablation power supply with a brief time-constant capacitive discharge that delivers up to 40 J and 3,000 V and 2) a low-energy ablation catheter with a contoured distal electrode. We performed in vitro and in vivo studies of this new system and compared arcing shocks with nonarcing shocks. Ablations were peprformed using unipolar distal shocks (D) and unipolar shocks to both electrodes made electrically common (P-D). In vitro studies were done in a large tank filled with physiological saline while recording voltage, current, and pressure. High-speed cinematography (32,000 frames/sec) of shocks of 10-40 J permitted detailed analysis of the vapor globe. Anodal shocks of less than 20 J showed no arcing or only minimal vapor globe formation. For D and P-D anodal shocks of 40 J, the diameters of the vapor globe were 31 and 22 mm, respectively, corresponding to pressure recordings of 11 and 4.9 atm. The pressure rise lasted less than 50 μsec. In vivo studies involved 18 dogs that received nonarcing shocks (one to six shocks of 15 J) and 18 dogs that received arcing shocks (one to three shocks of 40 J)

Affiliations:

Le document en format XML

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<term>Cardiac Tamponade (prevention & control)</term>
<term>Cardiovascular disease</term>
<term>Catheter</term>
<term>Conduction disorder</term>
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<term>Experimental study</term>
<term>Exploration</term>
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<term>Models, Cardiovascular</term>
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<term>Pathology</term>
<term>Treatment</term>
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<term>Wolff-Parkinson-White Syndrome (surgery)</term>
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<term>Coronary Vessels</term>
<term>Heart Conduction System</term>
<term>Wolff-Parkinson-White Syndrome</term>
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<term>Chien</term>
<term>Energie électrique</term>
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<term>Trouble conduction</term>
<term>Trouble excitabilité</term>
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<front><div type="abstract" xml:lang="en">This system includes 1) a low-energy ablation power supply with a brief time-constant capacitive discharge that delivers up to 40 J and 3,000 V and 2) a low-energy ablation catheter with a contoured distal electrode. We performed in vitro and in vivo studies of this new system and compared arcing shocks with nonarcing shocks. Ablations were peprformed using unipolar distal shocks (D) and unipolar shocks to both electrodes made electrically common (P-D). In vitro studies were done in a large tank filled with physiological saline while recording voltage, current, and pressure. High-speed cinematography (32,000 frames/sec) of shocks of 10-40 J permitted detailed analysis of the vapor globe. Anodal shocks of less than 20 J showed no arcing or only minimal vapor globe formation. For D and P-D anodal shocks of 40 J, the diameters of the vapor globe were 31 and 22 mm, respectively, corresponding to pressure recordings of 11 and 4.9 atm. The pressure rise lasted less than 50 μsec. In vivo studies involved 18 dogs that received nonarcing shocks (one to six shocks of 15 J) and 18 dogs that received arcing shocks (one to three shocks of 40 J)</div>
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La maladie de Parkinson au Canada (serveur d'exploration)

In vitro and in vivo effects within the coronary sinus of nonarcing an arcing shocks using a new system of low-energy DC ablation

In vitro and in vivo effects within the coronary sinus of nonarcing an arcing shocks using a new system of low-energy DC ablation

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	La maladie de Parkinson au Canada (serveur d'exploration)
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.