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Persistent junctional reciprocating tachycardia in the fetus
M A Oudijk1, P Stoutenbeek, N Sreeram
1Department of Obstetrics, Wilhelmina Children's Hospital/University Medical Center, Utrecht, The Netherlands.
Summary
Early diagnosis and management of fetal persistent junctional reciprocating tachycardia (PJRT) are crucial for preventing heart failure. Transplacental and postnatal therapies, including flecainide, sotalol, and radiofrequency ablation, show promise in treating this rare fetal arrhythmia.
Area of Science:
- Fetal cardiology
- Pediatric electrophysiology
- Cardiac arrhythmias
Background:
- Persistent junctional reciprocating tachycardia (PJRT) is a rare fetal arrhythmia requiring aggressive management to prevent congestive heart failure (CHF).
- Early diagnosis and intervention are critical for improving outcomes in affected fetuses.
Observation:
- A retrospective study analyzed four fetuses diagnosed with supraventricular tachycardia (SVT) of the PJRT type.
- Prenatal M-mode echocardiography revealed characteristic features suggestive of a slow-conducting accessory pathway in three fetuses.
Findings:
- Sustained SVT with a mean heart rate of 228 beats/min was observed, with CHF present in two fetuses.
- Transplacental flecainide was effective in one case; sotalol (with or without digoxin) partially treated three others.
- Postnatal management included propranolol and radiofrequency ablation in refractory cases.
Implications:
- Prenatal diagnosis of PJRT with characteristic echocardiographic findings guides management strategies.
- Transplacental and postnatal pharmacological therapies are effective, with radiofrequency ablation indicated for resistant cases.
- Timely intervention can mitigate the risk of fetal hydrops and improve outcomes for persistent junctional reciprocating tachycardia.