My Daughter was diagnosed with SVT at 4 years of age. Since then she has had only a few episodes that I know of and she is now 9. When she was 7 she had an extreme episode where her heart rate was 170 bpm 1 hour after running the mile at school. She saw a pediatric cardiologist and they also found a small hole between the upper chambers. Last weekend two nights in a row she woke up saying her heart hurts her heart rate was 130 bpm for an extended period of time. Her heart rate never went below 100 bpm till Tuesday and in the AM it was 69 bpm. She has an appointment on August 4 with a pediatric cardiologist, but my question is will this just continue to get worse the older and more involved she gets in her sports?

Summarized question: Does supraventricular tachycardia worsen with age?