Clinical and genetic characterization of patients with catecholaminergic polymorphic ventricular tachycardia: a case series
- Authors: Komissarova S.M.1, Rineiska N.M.1, Chakova N.N.2, Niyazova S.S.2, Plashchinskaya L.I.1, Barsukevich V.C.1, Podpalova O.V.1
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Affiliations:
- State Institution Republican Scientific and Practical Centre “Cardiology”
- Institute of Genetics and Cytology of Belarus National Academy of Sciences
- Issue: Vol 3, No 3 (2023)
- Pages: 27-40
- Section: Case reports
- URL: https://ogarev-online.ru/cardar/article/view/253793
- DOI: https://doi.org/10.17816/cardar568180
- ID: 253793
Cite item
Abstract
AIM: of the study was to evaluate the clinical and genetic characteristics, including the development of adverse events and outcomes in patients with catecholaminergic polymorphic ventricular tachycardia (CPVT).
MATERIALS AND METHODS: The clinical phenotype of eight patients with CPVT, two of whom were relatives of probands, was observed over 4 years. The clinical and instrumental study included ECG-12, 24-hour Holter ECG monitoring, genealogical history collection and family history of sudden cardiac death (SCD), transthoracic echocardiography and cardiac magnetic resonance imaging to detect structural myocardial changes, electrophysiologic study according to indications, and ICD monitoring. High-throughput sequencing (NGS) was utilized to search for mutations in genes linked to the onset of channelopathies and other inherited rhythm disorders.
RESULTS: In 8 patients, nucleotide variants of pathogenicity classes III-V were identified according to the ACMG (2015) criteria in the RYR2 gene associated with CPVT. Pathogenic (IV-V class) and likely pathogenic (IV class) mutations in the RYR2 gene were found in 6 (75%) probands, variants with uncertain clinical significance (VUS, class III) were found in 2 patients. At the time of diagnosis, transient QTc interval prolongation of more than 480 ms was detected in 4 (50%) patients; bradycardia less than 54 beats/min — in 2 (25%) patients, sequences of supraventricular tachycardia and ventricular tachyarrhythmia — in 2 (25%) patients. The most severe form of the disease with marked clinical manifestations and an episode of clinical death with subsequent resuscitation, as well as a transient QTc interval prolongation exceeding 500 ms was observed in patients with mutations c.11814C > A (p.Ser3938Arg, rs794728704); c.463G > A (p.Gly155Arg) and c.14876G > A (p.Arg4959Gln, rs794728811) in the RYR2 gene. Three (37.5%) patients underwent ICD implantation; one for primary SCD prevention and two for secondary prevention.
CONCLUSION: In this study, the spectrum of clinical manifestations in patients with genetically confirmed CPVT was examined. The findings highlight transient QTc interval extensions, significant sinus bradycardia, and sequences of supraventricular tachyarrhythmias, which can escalate into life-threatening ventricular tachyarrhythmias in CPVT patients.
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##article.viewOnOriginalSite##About the authors
Svetlana M. Komissarova
State Institution Republican Scientific and Practical Centre “Cardiology”
Email: kom_svet@mail.ru
ORCID iD: 0000-0001-9917-5932
SPIN-code: 8023-5308
MD, Dr. Sci. (Med.), Associate Professor, chief researcher, Laboratory of Chronic Heart Failure, State Institution Republican Scientific and Practical Centre “Cardiology”
Belarus, MinskNadiia M. Rineiska
State Institution Republican Scientific and Practical Centre “Cardiology”
Author for correspondence.
Email: nadya.rin@gmail.com
ORCID iD: 0000-0002-1986-1367
SPIN-code: 2782-2270
Cand. Sci. (Med.), junior researcher, Laboratory of Chronic Heart Failure, State Institution Republican Scientific and Practical Centre “Cardiology”
Belarus, MinskNatalya N. Chakova
Institute of Genetics and Cytology of Belarus National Academy of Sciences
Email: chaknat@mail.ru
ORCID iD: 0000-0003-4721-9109
SPIN-code: 5682-1497
Cand. Sci. (Biol.), PhD, leading researcher, Laboratory of Animal Genetics, Institute of Genetics and Cytology of Belarus National Academy of Sciences
Belarus, MinskSvetlana S. Niyazova
Institute of Genetics and Cytology of Belarus National Academy of Sciences
Email: kruglenko_sveta@tut.by
ORCID iD: 0000-0002-3566-7644
SPIN-code: 1093-1793
junior researcher, Laboratory of Animal Genetics, Institute of Genetics and Cytology of Belarus National Academy of Sciences
Belarus, MinskLarisa I. Plashchinskaya
State Institution Republican Scientific and Practical Centre “Cardiology”
Email: lario2001@mail.ru
ORCID iD: 0000-0001-8815-3543
SPIN-code: 2666-1270
Cand. Sci. (Med.), leading researcher, Laboratory of Cardiac Arrhythmias, State Institution Republican Scientific and Practical Centre “Cardiology”
Belarus, MinskVeronika Ch. Barsukevich
State Institution Republican Scientific and Practical Centre “Cardiology”
Email: barsukevich.v@gmail.com
ORCID iD: 0000-0002-5180-7950
SPIN-code: 9413-7121
Cand. Sci. (Med.), leading researcher, Laboratory of Cardiac Arrhythmias, State Institution Republican Scientific and Practical Centre “Cardiology”
Belarus, MinskOlga V. Podpalova
State Institution Republican Scientific and Practical Centre “Cardiology”
Email: olgapodpalova22@gmail.com
ORCID iD: 0000-0002-7162-3737
SPIN-code: 1617-8500
Cand. Sci. (Med.), researcher, Laboratory of Cardiac Arrhythmias, State Institution Republican Scientific and Practical Centre “Cardiology”
Belarus, MinskReferences
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