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Unusual case of tachycardia termination: what is the mechanism?
  • Ahmed T. Moustafa,
  • Paul Purves,
  • George J. Klein
Ahmed T. Moustafa
London Health Sciences Centre University Hospital

Corresponding Author:[email protected]

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Paul Purves
St Mary's General Hospital Foundation
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George J. Klein
London Health Sciences Centre University Hospital
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Case: A 41-year-old man with no prior cardiac history and a history of regular narrow QRS tachycardia, presenting with frequent paroxysmal palpitations, was referred to our institution. The tachycardia was adenosine-sensitive, leading to the acute termination of the tachycardia. The baseline electrocardiogram was unremarkable. During an electrophysiology study (EPS), supraventricular tachycardia (SVT) was easily induced by ventricular extrastimuli. Figure [1](#fig-cap-0003) shows a single ventricular extrastimulus applied from the right ventricular apex (RVa) during the tachycardia, and this finding was reproducible. Questions: What is the mechanism of the observed response? What are the clinical implications?
19 Jun 2023Submitted to Journal of Cardiovascular Electrophysiology
19 Jun 2023Review(s) Completed, Editorial Evaluation Pending
19 Jun 2023Submission Checks Completed
19 Jun 2023Assigned to Editor
21 Jun 2023Editorial Decision: Revise Minor
03 Jul 20231st Revision Received
09 Jul 2023Submission Checks Completed
09 Jul 2023Assigned to Editor
09 Jul 2023Review(s) Completed, Editorial Evaluation Pending
11 Jul 2023Editorial Decision: Accept