Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience

Andersen-Tawil syndrome (ATS) is a rare genetic disorder characterized by periodic paralysis, ventricular arrhythmia, and dysmorphic features. However, the classical features are not always seen in the syndrome; therefore, the diagnosis can be challenging. We describe our experience with ATS in Riya...

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Main Authors: Norah A. Alrashed, Waleed M. Al-Manea, Sahar A. Tulbah, Zuhair N. Al-Hassnan
Format: Article
Language:English
Published: Elsevier 2019-12-01
Series:International Journal of Pediatrics and Adolescent Medicine
Online Access:http://www.sciencedirect.com/science/article/pii/S2352646718301984
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spelling doaj-40da7edf5d8a4d609cebe3f3614ad2b02020-11-25T01:15:24ZengElsevierInternational Journal of Pediatrics and Adolescent Medicine2352-64672019-12-0164158164Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experienceNorah A. Alrashed0Waleed M. Al-Manea1Sahar A. Tulbah2Zuhair N. Al-Hassnan3Princess Nourah Bint Abdulrahman University – College of Medicine, Riyadh, Saudi ArabiaDivision of Pediatric Cardiology, Security Forces Hospital, Riyadh, Saudi ArabiaCardiovascular Genetics Program, Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia; Corresponding author. Cardiovascular Genetics Program, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.Cardiovascular Genetics Program, Department of Medical Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi ArabiaAndersen-Tawil syndrome (ATS) is a rare genetic disorder characterized by periodic paralysis, ventricular arrhythmia, and dysmorphic features. However, the classical features are not always seen in the syndrome; therefore, the diagnosis can be challenging. We describe our experience with ATS in Riyadh, Saudi Arabia, by presenting a case series involving four patients in the pediatric cardiology clinic confirmed to have ATS. Despite the diversity in phenotypes and clinical course among the four cases, all patients had bidirectional ventricular tachycardia and were confirmed to have ATS by performing genetic testing. In this case series, we identified one novel and three previously described KCNJ2 mutations. We also confirmed the beneficial effect of AAI pacing in one of our patients, together with medical therapy with β-blockers and flecainide. In Saudi Arabia, there is a distinct genetic pool and a high incidence of inherited diseases. Raising awareness about these diseases is crucial, especially in a country such as Saudi Arabia, wherein consanguinity remains a significant factor leading to an increased incidence of inherited diseases. Furthermore, because of the limited information available regarding this rare syndrome, we believe that this case series would offer an opportunity to provide a better understanding of ATS in our local region and worldwide.http://www.sciencedirect.com/science/article/pii/S2352646718301984
collection DOAJ
language English
format Article
sources DOAJ
author Norah A. Alrashed
Waleed M. Al-Manea
Sahar A. Tulbah
Zuhair N. Al-Hassnan
spellingShingle Norah A. Alrashed
Waleed M. Al-Manea
Sahar A. Tulbah
Zuhair N. Al-Hassnan
Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience
International Journal of Pediatrics and Adolescent Medicine
author_facet Norah A. Alrashed
Waleed M. Al-Manea
Sahar A. Tulbah
Zuhair N. Al-Hassnan
author_sort Norah A. Alrashed
title Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience
title_short Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience
title_full Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience
title_fullStr Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience
title_full_unstemmed Phenotypic variability in a series of four pediatric patients with Andersen-Tawil syndrome: A Saudi experience
title_sort phenotypic variability in a series of four pediatric patients with andersen-tawil syndrome: a saudi experience
publisher Elsevier
series International Journal of Pediatrics and Adolescent Medicine
issn 2352-6467
publishDate 2019-12-01
description Andersen-Tawil syndrome (ATS) is a rare genetic disorder characterized by periodic paralysis, ventricular arrhythmia, and dysmorphic features. However, the classical features are not always seen in the syndrome; therefore, the diagnosis can be challenging. We describe our experience with ATS in Riyadh, Saudi Arabia, by presenting a case series involving four patients in the pediatric cardiology clinic confirmed to have ATS. Despite the diversity in phenotypes and clinical course among the four cases, all patients had bidirectional ventricular tachycardia and were confirmed to have ATS by performing genetic testing. In this case series, we identified one novel and three previously described KCNJ2 mutations. We also confirmed the beneficial effect of AAI pacing in one of our patients, together with medical therapy with β-blockers and flecainide. In Saudi Arabia, there is a distinct genetic pool and a high incidence of inherited diseases. Raising awareness about these diseases is crucial, especially in a country such as Saudi Arabia, wherein consanguinity remains a significant factor leading to an increased incidence of inherited diseases. Furthermore, because of the limited information available regarding this rare syndrome, we believe that this case series would offer an opportunity to provide a better understanding of ATS in our local region and worldwide.
url http://www.sciencedirect.com/science/article/pii/S2352646718301984
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