Syncope in Hereditary Arrhythmogenic Syndromes.

Area of Science:

• Cardiovascular Genetics
• Molecular Cardiology
• Electrophysiology

Background:

• The discovery of the first long QT syndrome (LQTS) mutation in 1995 marked the beginning of significant advancements in understanding hereditary arrhythmogenic syndromes.
• The field has since expanded to encompass several distinct genetic cardiac conditions.

Purpose of the Study:

• To provide an overview of the current landscape of hereditary arrhythmogenic syndromes.
• To highlight the genetic basis of conditions beyond LQTS, including Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia, and short QT syndrome.
• To introduce the potential genetic etiology of malignant early repolarization syndrome.

Main Methods:

• Literature review of genetic discoveries in arrhythmogenic syndromes.
• Synthesis of current knowledge on the genetic underpinnings of LQTS, Brugada syndrome, CPVT, and SQTS.
• Review of emerging evidence for genetic causes of early repolarization syndrome.

Main Results:

• The identification of genetic mutations has been central to defining LQTS, Brugada syndrome, catecholaminergic polymorphic ventricular tachycardia (CPVT), and short QT syndrome (SQTS).
• These syndromes represent a spectrum of inherited cardiac electrical disorders.
• Emerging research suggests a genetic etiology for malignant early repolarization syndrome.

Conclusions:

• The genetic basis of cardiac arrhythmogenic syndromes is a rapidly evolving field.
• Multiple distinct genetic disorders are now recognized, impacting cardiac repolarization and rhythm.
• Further research into early repolarization syndrome is warranted to confirm its genetic origins.