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Perinatal supraventricular tachycardia.

M B Smith1, D Colford, D G Human

  • 1Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia.

The Canadian Journal of Cardiology
|July 1, 1992
PubMed
Summary
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Perinatal supraventricular tachycardia (SVT) is common in tertiary centers, affecting 1 in 4347 newborns. This usually benign condition is easily treated with digoxin and propranolol, with a good prognosis.

Area of Science:

  • Neonatal cardiology
  • Pediatric electrophysiology

Background:

  • Perinatal supraventricular tachycardia (SVT) is a significant arrhythmia in newborns.
  • Understanding its incidence, treatment, and outcomes is crucial for clinical management.

Purpose of the Study:

  • To determine the incidence, required therapies, and prognosis of perinatal supraventricular tachycardia (SVT).

Main Methods:

  • Retrospective chart review over eight years at a tertiary perinatal and pediatric center.
  • Inclusion of all newborn infants diagnosed with SVT in utero or within the first 30 days of life.

Main Results:

  • SVT occurred in 33 neonates (incidence 1:4347), with a 2.7:1 male:female ratio.
  • 94% received digoxin, and 24% also required propranolol; all infants were asymptomatic within 48 hours.

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  • No major congenital heart disease was found; one late death occurred due to unrelated renal failure. Four late relapses were noted over 44 months.

    • Conclusions:

    • Perinatal SVT is a common, generally benign condition in tertiary care settings.
    • It often represents a transient adaptation phenomenon with a favorable prognosis.
    • The condition is typically easily treated and rarely associated with major congenital heart disease.