I ve been tested in the past for PSVT, because I ve had symptoms, and my dad was diagnosed with it. Sadly each time I have the halter monitor nothing happens. Last Night my heart went from 120ish-150 bpm in about 10 minutes. I went to sleep, and it was fine by this morning. But it just went back up to 150, and I m slightly worried. I m faint, and weak. What should I do?