Hey antsy. I'll tell you... I wish I had a dollar for every time someone asks this question. For me, someone who had a near lifetime of SVT, 54 years, it's easy to discern the difference. But for someone who's feeling this for the first time, or is not familiar with SVT symptoms, it can easily be mistaken for a panic attack. Of course, I can't be there when you get one. I can only tell you what SVT feels like and how if differs from anxiety or a panic attack.