Key result
Intravenous ATP unmasks incessant atrial tachycardia refractory to cardioversion and antiarrhythmic medications.
Case Report (n=1)
A case report detailing the electrophysiological evaluation of an incessant atrial tachycardia resistant to cardioversion and medication in a 20-year-old woman.
Case PresentationA 20-year-old woman was referred for an electrophysiological evaluation because of a weak history of incessant palpitations with a loss of appetite, chest oppression and general fatigue.A 12-lead ECG demonstrated a narrow QRS tachycardia with a cycle length of 280-300 msec.An intravenous administration of adenosine triphosphate revealed an atrial tachycardia (AT) with atrioventricular block and a P-wave morphology during the AT that was positive in lead I, the inferior leads, and V1 (Fig. 1A).Direct current cardioversion or medication was not able to terminate the AT, and
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Kowase et al. (2008) conducted a case report in Atrial tachycardia (n=1). Adenosine triphosphate and direct current cardioversion was evaluated on Termination of atrial tachycardia. In a 20-year-old woman with incessant atrial tachycardia, intravenous adenosine triphosphate revealed AT with AV block, which could not be terminated by direct current cardioversion or medication.
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