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Updated: Jan 6, 2026

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation

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Published on: January 16, 2019

Update on long QT syndrome.

Víctor Neira¹, Andrés Enriquez¹, Chris Simpson¹

¹Division of Cardiology, Queen's University, Kingston, Ontario, Canada.

Journal of Cardiovascular Electrophysiology

|October 10, 2019

Summary

Long QT syndrome (LQTS) is an inherited heart condition causing dangerous arrhythmias. Genetic testing is now key for diagnosing and managing LQTS, improving patient risk stratification.

Keywords:

QT interval electrocardiography long QT torsades de pointes

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Area of Science:

Cardiology
Genetics
Molecular Biology

Background:

Long QT syndrome (LQTS) is an inherited cardiac disorder.
Characterized by a prolonged QT interval and risk of malignant arrhythmias.
Patients typically have a structurally normal heart.

Purpose of the Study:

To provide an updated review of Long QT syndrome.
Focus on the genetic basis, diagnosis, and clinical management.
Highlight advances in molecular genetics and genetic testing.

Main Methods:

Review of scientific literature on LQTS.
Analysis of advancements in molecular genetics.
Discussion of diagnostic criteria and risk stratification strategies.

Main Results:

Sixteen genes associated with LQTS have been identified.
Genetic testing is integral to LQTS diagnosis and risk assessment.
Understanding of LQTS mechanisms has significantly improved.

Conclusions:

LQTS is a genetically complex inherited arrhythmia syndrome.
Genetic testing is essential for diagnosis and management.
Continued research improves understanding and treatment of LQTS.