Non-Iatrogenic Localized-Reentrant Figure of Eight Atrial Tachycardias in the Superior Vena Cava

Shota Tokuno; Kenjiro Miyamoto; Ryuichi Usui

doi:10.1155/2023/5074946

Non-Iatrogenic Localized-Reentrant Figure of Eight Atrial Tachycardias in the Superior Vena Cava

Case Rep Cardiol. 2023 May 24:2023:5074946. doi: 10.1155/2023/5074946. eCollection 2023.

Authors

Shota Tokuno¹, Kenjiro Miyamoto², Ryuichi Usui²

Affiliations

¹ Cardiovascular Division, Department of Internal Medicine, Asahikawa Medical University, 2-1-1-1, Midorigaoka-Higashi, Asahikawa, Hokkaido 078-8510, Japan.
² Department of Cardiology, Sapporo Shiroishi Memorial Hospital, 8-Minami1-10, Shiroishi-ku, Sapporo, Hokkaido 003-0026, Japan.

Abstract

Introduction: The superior vena cava (SVC) is an important non-pulmonary venous foci of atrial fibrillation (AF) and is known as the arrhythmogenic site of scar-related atrial tachycardia (AT). Scar-related ATs may occur after catheter ablation and open heart surgery; however, idiopathic AT rarely occurs. Case Presentation. A 77-year-old male with terminal diabetic nephropathy complained of dialysis-induced hypotension due to AF and was admitted to our hospital for catheter ablation. Here, we report a case of non-iatrogenic localized-reentrant figure of eight AT in the SVC.

Conclusion: SVC has the arrhythmogenic potential for re-entrant tachycardia, and the development of mapping technology can reveal arrhythmogenic mechanisms.

Publication types

Case Reports