Describes a rare case of adult junctional ectopic tachycardia associated with intrahisian conduction delay.
May alert clinicians to intrahisian delay in rare adult JET-VT; hypothesis-generating and leaves mechanistic questions open.
Junctional ectopic tachycardia (JET) is an uncommon arrhythmia that mainly affects pediatric patients. However, its clinical presentation may rarely occur in adulthood. Owing to its incessant nature, limited responsiveness to antiarrhythmic agents and poor prognosis, catheter ablation of the junctional focus is often required, even though this may be accompanied by the occurrence of complete atrioventricular block. We report the case of a 68-year-old man with episodes of sustained ventricular tachycardia and repetitive JET whose initiation was often anticipated by a sudden intrahisian conduction delay in the immediately preceding sinus beats.
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Ducceschi et al. (2008) studied this question.
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