arrhythmic
adj. arrítmico, asincrónico

ablación (f)
n. ablation, surgical removal, excision

sustrato (m)
n. substratum, layer that lies beneath another

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Note added at 6 mins (2009-02-19 13:45:08 GMT)
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Surgical ablation (removal) of the source of the arrhythmia (rhythm problem) is also sometimes possible

A recent study of endocardial mapping of ganglionated plexuses during catheter ablation also showed that ablation of substrate or trigger alone, or both, without modification of the modulating factor (autonomic tone), may be sufficient for succesful ablation of AF. Ultimately, a better knowledge of electrophysiological mechanisms is necessary for the development of effective preventive measures.

Catheter Ablation
The catheter ablation techniques use transvenous radiofrequency and cryoablation catheters to ablate triggers in the atria, destroying myocardial cells that contribute critically to the initiation of an atrial fibrillation. Based on the success of surgical approaches to AF, several catheter ablation strategies have been designed to produce similar effects [16]. Ablation strategies limited to the right atrium produce marginal improvement, whereas linear ablation in the left atrium has been more successful [1]. The recognition that foci triggering AF often originate within the pulmonary veins has led to ablation strategies that target this zone or electrically isolate the pulmonary veins from the left atrium. Other sites of arrhythmogenic foci have been found in the superior vena cava, the right atrium and the left atrium, and the coronary sinus [9]. Ablation of these foci eliminates the frequency of AF in more than 60% of patients, but the risk of recurrent AF after a focal ablation procedure is still 30% to 50% for the first year and even higher when more than one pulmonary vein is involved. Thus many patients continue to require anti-arrhythmic drug regimen after catheter-based ablative therapy of AF.

saludos!

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Note added at 9 minutos (2009-02-19 13:48:33 GMT)
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Note added at 11 minutos (2009-02-19 13:50:16 GMT)
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High-precision guidance of ablation catheters to arrhythmic sites ... - [ Traducir esta página ]If a current dipole is produced at the ablation catheter tip, ... is able to guide the catheter tip to within 1.5 mm of the arrhythmic site at any location ...
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Method for guiding the ablation catheter to the ablation site: a ... - [ Traducir esta página ]Radiofrequency catheter ablation (RCA) procedures for treating ventricular ... guide the catheter tip to the arrhythmic site during an RCA procedure. ...
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Maneuverable electrophysiology catheter for percutaneous or ... - [ Traducir esta página ]site for ablation; placing the distal end of the catheter proximate the arrhythmic site; activating the stabilizer; advancing the optical fiber through the ...
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Method and apparatus for the guided ablative therapy of fast ... - [ Traducir esta página ]The location of the tip of an ablation catheter is similarly localized from .... When the catheter tip dipole and arrhythmic site dipole are calculated to ...
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Diagnostic and Therapeutic Implications - [ Traducir esta página ]hlock were referred for evaluation. All six patients underwent attempted radiofrequency ablation of the. putative arrhythmic site. Three of six patients had ...
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