Paroxysmal Supraventricular Tachycardia (PSVT) is the most common symptomatic tachyarrhythmia in childhood. It occurs in one out of every 250 to 1000 children. The initial onset of this arrhythmia may occur in utero, within the first few weeks of life, or may first occur in adolescence.
Ninety three percent of all infants diagnosed with PSVT will outgrow it by 10 months of age. Interestingly, approximately 35% of the children who "outgrow it" will have a recurrence between the ages of 5 and 8 years of age.
PSVT is a collective name for a group of arrhythmias with:
Take a moment to see Rnceus Interactive's animated review of normal cardiac conduction.
Specific electrocardiogram (EKG) characteristics of pediatric PSVT are:
About 1/3 of the children who outgrow PSVT have a recurrence at about 5 to 8 years of age.
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