¿Debería decirles a mis padres que tengo SVT?

Actualmente tengo 14 años y fui diagnosticado con TAVC a los 9 años. Comencé a tomar medicamentos tan pronto como me enteré para detenerlo y desapareció después de un tiempo. Recientemente he estado teniendo TAVC en cada clase de educación física y me siento mareado, mi visión se vuelve borrosa y siento opresión en el pecho. Los episodios suelen durar de 30 minutos a una hora y reducen mi capacidad para hacer ejercicio en clase. Estoy considerando someterme a una Ablación por Catéter, pero mis padres no saben que aún está sucediendo

You do realise that you can't have a procedure without your parent's consent?  Or even see a Dr.   SVT is not dangerous but If the symptoms are bothering you and you want treatment then ask your parents to take you to the Dr.  This is not even a question.

Please tell your parents it's still happening. You need to see your cardiologist and discuss your options. They may want to change your meds or consider the ablation. I had it done 2 months ago and haven't had any episodes, but I do get occasional PACs.

Tell your parents!

You should tell your parents and see an electro physiologist.  As young as you are they might recomend an ablation so that you can enjoy exercising in your teen years and not be bothered with an attack.  Ablation has a 90% cure rate.

Daniel, I'm troubled that you aren't talking with your parents about your SVT.  My younger daughter and I had a difficult relationship when she was a teenager (thankfully, we're doing very well now), but in the midst of that mess she told me that her heart was "doing some weird stuff".  We talked, and I was able to use my experiences to get her the temporary help she needed.  Is there another adult you could talk with? I want you to, as soon as possible,  get the help you need, too.  An actual cure may be available for you, and I want you to have that.  Let us know, please, how you are.