Hi. I'm 16 and have psvt (svt) and was wondering is that normal? They gave me vitamins and sent me on my way. Will this hurt my heart? Goes up to 150bpm

Possibly. This may be a sign of an abnormal conduction system in the heart. Sometimes, the ekg will reveal evidence to suggest this but in many cases, the ekg will only show the abnormality during the svt. Sometimes, it is only possible to detect the abnormality by doing provocative procedures, or in the electrophysiology laboratory. It there is an abnormality of the conduction system is may be curable.