A case of bidirectional conduction block within the superior vena cava induced by cryoballoon pulmonary vein isolation. Issue 1 (3rd October 2018)

• Record Type: Journal Article
• Authors: Watanabe, Tomonori; Hachiya, Hitoshi; Igarashi, Miyako; Kusa, Shigeki; Iesaka, Yoshito
• Is Part Of: Pacing and clinical electrophysiology. Volume 42:Issue 1(2019)
• Page Start: 107
• Page End: 109
• Publication Date: 2018-10-03
• Subjects: atrial fibrillation -- cryoballoon ablation -- pulmonary vein isolation -- superior vena cava; Cardiac pacing -- Periodicals; Electrophysiology -- Periodicals; 617.4120645
• DOI: 10.1111/pace.13486
• Languages: English
• ISSNs: 0147-8389

Abstract

Abstract: A 53‐year‐old male underwent a pulmonary vein isolation (PVI) of atrial fibrillation (AF) with a second‐generation cryoballoon (CB). Although the patient maintained sinus rhythm after the PVI, a superior vena cava (SVC) fibrillation was recorded by a circular‐multipolar‐electrode catheter positioned inside the SVC that suggested conduction block between the right atrium (RA)‐SVC connection. An adenosine triphosphate intravenous injection induced a dormant reconnection of the SVC myocardial sleeve and converted sinus rhythm to an AF rhythm. This case demonstrated that a CB application for the isolation of a right superior pulmonary vein could induce an electrical conduction block between the RA‐SVC connection.