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Updated: May 15, 2026
07:15
Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
[Clinical conditions associated with abnormal QT interval: clinical implications]
Lia Crotti1, Cinzia Dossena, Elisa Mastantuono
1Sezione di Cardiologia, Dipartimento di Medicina Molecolare, Università degli Studi, Pavia, Italy. liacrotti@yahoo.it
Giornale Italiano Di Cardiologia (2006)
|December 22, 2012
Summary
This review details QT interval measurement, genetic links to sudden cardiac death, and conditions like long QT syndrome and short QT syndrome. It also explores the QT interval's role in sudden infant death and heart conditions.
Area of Science:
- Cardiology
- Genetics
- Electrophysiology
Context:
- The QT interval on an electrocardiogram (ECG) is crucial for assessing cardiac repolarization.
- Abnormalities in QT interval duration are linked to significant risks of sudden cardiac death.
- Understanding the genetic underpinnings of QT interval variations is vital for risk stratification.
Purpose:
- To provide a comprehensive overview of QT interval measurement and correction techniques.
- To describe long QT syndrome and short QT syndrome, their genetic basis, and clinical implications.
- To discuss the prognostic significance of the QT interval in various cardiovascular conditions and future research directions.
Summary:
- This review covers practical QT interval measurement and heart rate correction.
- It details long QT syndrome and short QT syndrome as primary genetic disorders affecting QT length.
- The role of prolonged QT in sudden infant death syndrome, neonatal ECG screening, and its prognostic value in myocardial infarction and hypertrophic cardiomyopathy are discussed.
- Future perspectives on modifier genes influencing QT interval are also presented.
Impact:
- Improved understanding of QT interval abnormalities and their genetic basis can enhance the diagnosis and management of life-threatening cardiac arrhythmias.
- This review highlights the importance of ECG screening for identifying individuals at risk of sudden cardiac death.
- Insights into genetic factors and future research may lead to novel therapeutic strategies for inherited cardiac conditions.
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