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1.
Arq. bras. cardiol ; 61(4): 241-243, out. 1993. ilus
Article Dans Portugais | LILACS | ID: lil-148874

Résumé

A 8-year-old female patient with refractory incessant atrial tachycardia, very symptomatic and with left ventricular ejection fraction of 0.25. Electrophysiological study and endocardial mapping localized the site of the origin of atrial tachycardia in the superior right atrium. In this site 2 applications of radiofrequency current (25V, 20 and 50 seconds) resulted in termination of the atrial tachycardia. She was discharged off antiarrhythmic drugs and after 2 months ejection fraction was 0.52. She was completely asymptomatic 6 months after ablation procedure


Paciente de 8 anos com história de taquicardia atrial ectópica incessante e refratária a drogas antiarrítmicas, muito sintomática e tendo grande comprometimento da função ventricular, com fração de ejeção de 0,25. A paciente foi submetida a estudo eletrofisiológico e ao mapeamento endocárdico que localizou o foco da taquicardia na regino superior do átrio direito, observando-se precocidade de 40ms do eletrograma nesse local em relação à onda P do eletrocardiograma de superfície. Nesta região foram feitas 2 aplicações de radiofreqüência de 25V com 20 e 50s de duração, com desaparecimento da taquicardia. A paciente evoluiu sem arritmia e após 2 meses a fração de ejeção era de 0,52. Atualmente, encontra-se assintomática após 6 meses de acompanhamento ambulatorial


Sujets)
Humains , Femelle , Enfant , Tachycardie auriculaire ectopique/chirurgie , Ablation par cathéter/méthodes , Tachycardie auriculaire ectopique/diagnostic , Études de suivi , Ventricules cardiaques/physiopathologie
2.
Arq. bras. cardiol ; 61(2): 103-106, ago. 1993. ilus
Article Dans Portugais | LILACS | ID: lil-148733

Résumé

Two female patients, 54 and 38 years-old with refractory ventricular tachycardia were undertaken to electrophysiologic study for diagnosis and radiofrequency ablation of their arrhythmias. The tachycardias were only inducible with intravenous isoproterenol infusion. The site of the origin of ventricular tachycardia was localized in the right ventricular outflow tract in both cases. Radiofrequency current was delivered at 40V (40-60s) in each patient and was followed by complete abolition of ventricular arrhythmias


Sujets)
Humains , Femelle , Adulte , Adulte d'âge moyen , Tachycardie ventriculaire/chirurgie , Ablation par cathéter , Études de suivi , Tachycardie ventriculaire/diagnostic , Tachycardie ventriculaire/induit chimiquement , Électrocardiographie , Isoprénaline , Fonction ventriculaire droite/physiologie
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