Catecholaminergic polymorphic ventricular tachycardia in a child: a case report.

Area of Science:

• Cardiology
• Genetics
• Pediatrics

Background:

• Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a rare, life-threatening arrhythmogenic disorder.
• It typically manifests in childhood with exercise- or stress-induced ventricular tachyarrhythmias, syncope, and sudden death.
• Familial inheritance, often autosomal dominant, is observed in approximately 30% of cases.

Observation:

• CPVT is linked to genetic mutations, primarily in the cardiac ryanodine receptor gene (RyR2) for autosomal dominant forms and the calsequestrin gene (CASQ2) for recessive forms.
• The condition is characterized by stress-induced ventricular arrhythmias, syncope, and potential sudden cardiac death, particularly in pediatric patients.
• A specific case involved a three-year-old child diagnosed solely through genetic mapping.

Findings:

• Genetic mapping is essential for confirming or excluding CPVT in children presenting with syncope.
• Mutations in RyR2 and CASQ2 genes are identified as causative factors in CPVT.
• Early and accurate diagnosis through genetic analysis is critical due to the condition's potentially lethal nature.

Implications:

• Mandatory exclusion or confirmation of CPVT is necessary for children experiencing syncope.
• Genetic testing provides a definitive diagnosis for CPVT, even in young children.
• This highlights the importance of genetic diagnostics in managing pediatric cardiac arrhythmias.