The introduction of transcatheter ablation techniques has opened a new era of the management of @entity591 . The rationale of these therapeutic procedures lies in the induction of an irreversible and limited damage to cardiac tissue involved in @entity943 . In its original form, the technique involves the delivery of high energy DC discharges (fulguration) to the target area through a temporary catheter electrode. A primary drawback of fulguration, when used for ablation of AV node-His bundle, is the induction of a pacemaker-dependent state; the barotraumatic effect that results from high energy impulses constitutes the major limitation in the case of ablation of accessory pathways or arrhythmogenic areas. Recently, the efficiency of the procedure has been substantially improved by the use of low-power, high-frequency alternating current (radiofrequency), that allows to deliver graded amounts of disrupting energy to selected areas while avoiding undesirable biophysical effects to the surrounding tissue. Remarkable results, with a success rate close to 100%, are reported with radiofrequency ablation of AV node @entity591 , as well as reciprocating @entity591 associated with the @entity3155 , so that this technique can be considered the procedure of choice for both categories of @entity1 . Catheter modification of AV conduction provides a therapeutic tool for treating @entity4710 with rapid ventricular responses. In such cases, however, the risk of @entity713 with the need for pacemaker implantation must be taken into account. Results of catheter ablation of @entity1165 have been inconstant and generally disappointing, except for @entity1165 due to reentry in the His-Purkinje system, for which a high success rate is reported. Experience with radiofrequency ablation in @entity1165 is very limited, but localization of a critical segment of reentry could improve the efficiency of this technique.

[The transcatheter ablation of XXXX ].

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1165 :: ('MESH:D017180', 'Disease') :: ['ventricular tachycardias', 'ventricular tachycardia'] @entity3155 :: ('MESH:D011226', 'Disease') :: ['preexcitation syndrome'] @entity713 :: ('MESH:D054537', 'Disease') :: ['AV block'] @entity591 :: ('MESH:D013610', 'Disease') :: ['tachycardia', 'reentry tachycardia', 'tachyarrhythmias'] @entity4710 :: ('MESH:D013617', 'Disease') :: ['atrial tachyarrhythmias'] @entity943 :: ('MESH:D001145', 'Disease') :: ['arrhythmias']
@entity943 :: (MESH:D001145,Disease) :: ['arrhythmias']
