New research could lead to a better “map” for doctors trying to fix a rare, rapid rhythm in children’s hearts.

Doctors usually treat this condition by destroying the abnormal tissue that is disrupting the heart’s electrical rhythm. But finding that tissue can be hard; it’s not in the same spot for every person.

The researchers made their maps using electrical recordings from inside the heart to find the locations of high- and low-voltage tissues. That enabled them to more precisely target the weaker voltage tissues.

The condition is called atrioventricular nodal reentrant tachycardia, or AVNRT.

The researchers say this is the first study to try the technique in children, and it has the potential to improve success rates in treating children with the disorder.

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Researcher Information:

Lindsey Malloy, D.O., lead researcher and a cardiology fellow and researcher at University of Iowa Children’s Hospital in Iowa City