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A case of catecholaminergic polymorphic ventricular tachycardia.
Seung-Yul Lee1, Jin-Bae Kim, Eui Im
1Division of Cardiology, Yonsei Cardiovascular Center and Cardiovascular Research Institute, Yonsei University College of Medicine, 250 Seongsan-ro, Seodaemun-gu,Seoul, Korea.
Yonsei Medical Journal
|July 2, 2009
Summary
Catecholaminergic polymorphic ventricular tachycardia (CPVT), a genetic heart rhythm disorder, can be triggered by sinus tachycardia. This case highlights a rare presentation of CPVT in an 11-year-old female, emphasizing the need for vigilance in diagnosis.
Area of Science:
- Cardiology
- Genetics
- Pediatrics
Background:
- Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a severe inherited arrhythmia linked to RYR2 or CASQ2 gene mutations.
- CPVT typically presents with syncope or sudden cardiac death, often triggered by emotional or physical stress in individuals with structurally normal hearts.
Observation:
- An 11-year-old female experienced sudden cardiovascular collapse, initially presenting with ventricular fibrillation on ECG.
- Recurrent ventricular fibrillation occurred, evolving from bidirectional ventricular tachycardia during sinus tachycardia, a previously unreported trigger in Korea.
Findings:
- The patient's CPVT was triggered by sinus tachycardia, a novel observation in the context of this arrhythmia.
- The case underscores the potential for diverse triggers in CPVT, even in the absence of significant emotional or physical exertion.
Implications:
- This case expands the understanding of CPVT triggers and presentation, particularly in pediatric populations.
- Early recognition and diagnosis of CPVT, even with atypical triggers like sinus tachycardia, are crucial for preventing sudden cardiac death.
- Further research into the mechanisms linking sinus tachycardia to CPVT may reveal new therapeutic targets.
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