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Updated: Jun 19, 2026

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

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

Published on: January 16, 2019

Short QT syndrome: a review.

Umang Patel¹, Behzad B Pavri

¹Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, PA, USA.

Cardiology in Review

|October 16, 2009

Summary

This summary is machine-generated.

Hereditary short QT syndrome is a rare channelopathy causing sudden cardiac death. Characterized by a short QT interval, it presents risks for atrial fibrillation and ventricular tachyarrhythmias, necessitating further treatment research.

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Electrocardiogram Recordings in Anesthetized Mice using Lead II

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

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

Published on: January 16, 2019

Electrocardiogram Recordings in Anesthetized Mice using Lead II

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Published on: June 20, 2020

Area of Science:

Cardiology
Genetics
Electrophysiology

Background:

Channelopathies are ion-channel disorders often affecting structurally normal hearts.
Congenital long QT syndrome and Brugada syndrome were initial focuses; hereditary short QT syndrome is a recent addition.
This autosomal dominant condition affects all age groups and is linked to sudden cardiac death.

Purpose of the Study:

To describe the clinical presentation, genetic basis, and management of hereditary short QT syndrome.
To highlight the diagnostic features and risks associated with this rare channelopathy.

Main Methods:

Analysis of electrocardiogram (ECG) findings, including QT interval, ST segment, and T waves.
Electrophysiology studies to assess atrial and ventricular refractory periods and inducibility of arrhythmias.
Genetic analysis to identify mutations in potassium channel genes.

Main Results:

ECG shows a short QT interval (<320 ms), absent ST segment, and tall, peaked T waves.
Patients exhibit a propensity for paroxysmal atrial fibrillation and ventricular tachyarrhythmias.
Gain-of-function mutations in potassium channel genes correlate with abbreviated repolarization.

Conclusions:

Hereditary short QT syndrome is a significant channelopathy with a high risk of sudden cardiac death.
Implantable cardioverter-defibrillators are a suggested treatment, but inappropriate shocks are a concern.
Pharmacological options like quinidine and disopyramide show potential but require further clinical validation.