An unusual case of right ventricular outflow tract tachycardia.
In this report, we describe an unusual case of right ventricular outflow tract (RVOT) tachycardia with episodes of repetitive monomorphic ventricular tachycardia (VT), paroxysmal sustained VT and incessant monomorphic VT of the same morphology. Diltiazem, adenosine, or metoprolol failed to interrupt these arrhythmias. However, administration of intravenous propafenone completely eliminated all ventricular ectopic activity. Electrophysiologic study performed off propafenone showed that the ventricular ectopic activity originated from a single locus at the anterior wall of the RVOT. Two radiofrequency applications at this site resulted in complete elimination of ventricular ectopic activity.
Ozin
Bülent
B
Başkent University, School of Medicine, Department of Cardiology, Ankara, Turkey. bozin@trnet
Atar
Ilyas
I
Atar
Inci Asli
IA
Korkmaz
Mehmet Emin
ME
Müderrisoğlu
Haldun
H
D000328:Adult; D017115:Catheter Ablation; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006325:Heart Atria / Q000473:pathology / Q000601:surgery; D006329:Heart Conduction System / Q000473:pathology / Q000601:surgery; D006352:Heart Ventricles / Q000473:pathology / Q000601:surgery; D006801:Humans; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000601:surgery