In the textbook on Child Health,
in the section on Cardiovascular Alteration,
about Supraventricular Tachycardia, there is explanation
that children who are asymptomatic andhemodynamically stable
can be treated conservatively. Vagal maneuvers may be used to terminate an episode of SVT by eliciting the diving reflex. Immersing
the older child's face in ice water stimulates a vagal response that may stop the tachycardia; bbriefly placing an ice bag or bag of frozen vegetables over the infant's face accomplishes the same results.
Is these really done and effective?