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We report a case of long RP' tachycardia diagnosed as fast-slow atrioventricular nodal reentrant tachycardia (AVNRT) with a bystander nodoventricular pathway (NVP). Differential responses to right ventricular extrastimuli from the base and apex highlighted the anatomical proximity of the NVP attachment, contributing to the diagnosis.
View Article and Find Full Text PDFAtrial arrhythmias with mediastinal lymphadenopathy presentation of isolated atrial myocarditis.
J Arrhythm
February 2025
Department of Electrophysiology, Department of Cardiology AIG Institute of Cardiac Sciences and Research Hyderabad India.
Objectives: We present a case series of patients with granulomatous myocarditis presenting as atrial arrhythmias accompanied by lymphadenopathy.
Background: Atrial myocarditis (AM) may be the cause of atrial fibrillation (AF) in patients without risk factors.
Methods: Patients with atrial fibrillation without risk factors underwent 18F-Fluorodeoxyglucose positron emission tomography (18F-FDG-PET).
Long RP Tachycardia and Short RP Tachycardia: Is the Nodoventricular Pathway a Culprit or an Innocent Bystander?
J Cardiovasc Electrophysiol
January 2025
Division of Cardiology, Section of Cardiac Electrophysiology, University of California San Francisco, San Francisco, California, USA.
We encountered a single case in which a transition between orthodromic reciprocating tachycardia with a concealed nodoventricular pathway and atrioventricular nodal reentrant tachycardia with a bystander nodoventricular pathway was observed.
View Article and Find Full Text PDFAnalysis of junctional beats during slow pathway ablation: Illuminating the mechanism of typical and atypical AV nodal re-entrant tachycardia.
Heart Rhythm O2
December 2024
Department of Cardiovascular Medicine, Kyorin University School of Medicine, Mitaka, Japan.
Background: Junctional rhythm (JR) frequently occurs during radiofrequency (RF) ablation procedures targeting the slow pathway (SP) for atrioventricular nodal re-entrant tachycardia (AVNRT), signaling successful ablation. Two types of JR have been noticed: typical JR as His activation preceding atrial activation, and atypical JR as atrial activation preceding the His activation. Nevertheless, the origin and characteristics of JR remain incompletely defined.
View Article and Find Full Text PDFA Short HV Interval Tachycardia Terminated by His-Refractory Premature Atrial Extra-Stimulation: What Is the Mechanism?
J Cardiovasc Electrophysiol
January 2025
First Department of Cardiology, TEDA International Cardiovascular Hospital, Tianjin, China.
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