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Spontaneous resumption of severe infranodal conduction disturbances that followed COVID-19 vaccination.
J Electrocardiol
January 2025
Department of Cardiology, Central Japan International Medical Center, Gifu, Japan; Department of Cardiology, Graduate School of Medicine, Gifu University, Gifu, Japan; Department of Molecular Pathophysiology, Shinshu University Graduate School of Medicine, Matsumoto, Nagano, 390-8621, Japan.
We report reversible severe infranodal conduction disturbances that followed COVID-19 vaccination in a young woman. Right and left bundle branch conduction were impaired and recovered at different times, resulting in reversible paroxysmal complete atrioventricular block.
View Article and Find Full Text PDFAtypical Wenckebach AV Block in the Infra-Hisian Region: Clinical Implications and Management.
Am J Case Rep
December 2024
Department of Cardiac Pacing and Electrophysiology, Fortis Escorts Heart Institute (FEHI), New Delhi, India.
BACKGROUND Second-degree atrioventricular (AV) block is a frequently encountered conduction abnormality on surface electrocardiogram (ECG). However, it does not always imply a block at the AV nodal level. In rare cases, this block can occur below the bundle of His, within the infra-Hisian region of the His-Purkinje system.
View Article and Find Full Text PDFParadoxical restoration from complete and persistent atrioventricular block after surgical aortic valve replacement: a case report.
Eur Heart J Case Rep
October 2024
Department of Cardiology, Ibaraki Prefectural Central Hospital, 6528 Koibuchi, Kasama 309-1793, Japan.
Background: One of the most important and relatively frequent complications of aortic valve replacement is atrioventricular block. It typically occurs by direct injury of the infranodal conduction system due to intra-operative manipulation and persists post-operatively, necessitating permanent pacemaker implantation in many cases.
Case Summary: A 66-year-old man presented to our hospital after experiencing syncope while walking after drinking.
A long-standing conundrum: an unusual case of 2:1 atrioventricular block with conflicting findings.
Herzschrittmacherther Elektrophysiol
June 2024
Department of Cardiology, University of Health Sciences, Tepecik Training and Research Hospital, Izmir, Turkey.
A 2:1 atrioventricular (AV) block can occur anywhere within the conduction system, and noninvasive measurements may not always predict the exact site of the block. Although localization of the block is critical for deciding any treatment, patients should also be carefully questioned about symptoms both at rest and during exertion. A case of 2:1 AV block that was symptomatic only during exertion, appeared infranodal by noninvasive diagnostic methods, but was found to be intranodal on electrophysiological study is reported.
View Article and Find Full Text PDFClinical/electrophysiologic characteristics of infranodal Wenckebach in patients with indication for permanent ventricular pacing: A prospective study.
Heart Rhythm
November 2024
Department of Cardiac Electrophysiology and Pacing, Arrhythmia Heart Failure Academy, The Madras Medical Mission, Chennai, Tamil Nadu, India. Electronic address:
Article Synopsis
- Infranodal Wenckebach is a rare type of atrioventricular (AV) block, and this study aimed to explore its clinical and electrophysiological characteristics in patients needing permanent ventricular pacing.
- The study included 163 patients, finding that 13.4% had AV Wenckebach, with 7.3% specifically classified as infranodal, which showed distinct patterns compared to AV nodal Wenckebach.
- Key results indicated that infranodal Wenckebach patients had more severe heart function issues, longer conduction intervals, and specific electrocardiographic features, marking it as a significant finding for those needing pacemaker implantation.
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