Ablation of atrial tachycardia originating from the vicinity of the atrioventricular node: significance of mapping both sides of the interatrial septum.
J Am Coll Cardiol
; 38(2): 394-400, 2001 Aug.
Article
em En
| MEDLINE
| ID: mdl-11499729
ABSTRACT
OBJECTIVES:
The purpose of the study was to examine the value of right- and left-sided mapping to identify the site of tachycardia origin.BACKGROUND:
Focal atrial tachycardia may originate from the vicinity of the atrioventricular node from either side of the interatrial septum.METHODS:
In 16 patients undergoing radiofrequency catheter ablation of perinodal atrial tachycardia, activation mapping of the right and left side of the interatrial septum was performed.RESULTS:
Atrial tachycardia originated from the right side of the interatrial septum in 10 patients (group A) and from the left side in 6 patients (group B). On the right side, earliest atrial activity preceded the onset of the P-wave by 49 +/- 15 ms in group A and by 38 +/- 8 ms in group B (NS), and it preceded the signal recorded from the right atrial appendage by 59 +/- 19 ms in group A and by 60 +/- 13 ms in group B (NS). On the left side, earliest activity preceded the onset of the P-wave by 27 +/- 16 ms in group A and by 51 +/- 6 ms in group B (<0.01), and it preceded the signal obtained from the right atrial appendage by 38 +/- 19 ms in group A and by 73 +/- 9 ms in group B (<0.01). Atrial tachycardias were successfully eliminated in all patients without impairment of atrioventricular conduction. During follow-up, two patients had a recurrence of tachycardia.CONCLUSIONS:
Mapping of only the right side cannot exclude a left-sided origin. Therefore, mapping of both sides of the interatrial septum is required prior to ablation of focal atrial tachycardia originating from the vicinity of the atrioventricular node.
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Base de dados:
MEDLINE
Assunto principal:
Nó Atrioventricular
/
Taquicardia Atrial Ectópica
/
Ablação por Cateter
/
Técnicas Eletrofisiológicas Cardíacas
/
Septos Cardíacos
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
/
Prognostic_studies
Idioma:
En
Revista:
J Am Coll Cardiol
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Áustria