Atrioventricular Block in Young Subjects Induced by Vagal Hyperactivity and Interest of Exploring the Autonomic Nervous System: About 4 Cases
Published: 2022-11-19
Page: 313-318
Issue: 2022 - Volume 5 [Issue 1]
F. Karim *
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco.
M. Njie
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco.
P. M. Mulendele
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco.
M. Khalil
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco.
Pr M. Haboub
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco and Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca, Morocco.
Pr S. Arous
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco and Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca, Morocco.
Pr M. Ghali Benouna
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco and Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca, Morocco.
Pr A. Drighil
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco and Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca, Morocco.
Pr L. Azouzi
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco and Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca, Morocco.
Pr R. Habbal
Department of Cardiology, P37, Ibn Rochd University Hospital, Casablanca, Morocco and Faculty of Medicine and Pharmacy, Hassan II University of Casablanca, Casablanca, Morocco.
*Author to whom correspondence should be addressed.
Abstract
Vagal hyperactivity, which corresponds to excessive activity of the parasympathetic system, is a frequent cause of syncope, fainting and dizziness, hence the interest of exploring the autonomic nervous system (ANS) for confirmation.
High-degree atrioventricular (AV) block in patients with a history of syncope usually requires pacemaker implantation, therapeutic strategies should also be considered in young patients especially in the case of non-structural cardiopathy.
We report 4 cases of repeated episodes of syncope in young patients who presented at the emergency with an atrioventricular block (AV-block) of different degrees without any structural cardiopathy. The completion of the etiology findings in these patients came out positive for vagal hypersensitivity after ANS test. The patients were placed on diet and pharmacological therapy with a good clinical outcome without the immediate need for cardiac pacemaker implantation.
Keywords: Atrioventricular block, vagal hyperactivity, ANS test, ethyl-phenyl-ephrine
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