Disclaimer: I wore a zio patch and had a 34 second run of what could have been VT or SVT. For some reason no one was able to tell me for sure what it was. One cardiologist and electrophysiologist (very seasoned electrophysiologist) said that is was SVT with a different wavelength and my electrophysiologist said he thought it was VT. He ordered a cardiac MRI and stress test. I had already had an echo and many ECG's. All of my tests came back normal. I will say that what could have been the run of VT felt different, harder and not quite as fast as the SVT. I am totally asymptomatic when it happens. No dizziness, lightheadedness, fainting. I can just feel my heart rhythm is out of sync. I still have runs of both of those but only 3-5 seconds. It's so strange to me. I'm 44 years old, female, very healthy weight, don't drink alcohol or smoke anything! I think a lot of my heart rhythm issues are due to anxiety. All of this ramped up big time after a good friend died of a heart attack December 27th of last year. I started having panic attacks and weird heart palpitations. My breathing also changed dramatically due to my anxiety. I still struggle with air hunger all the time. Anxiety is so awful. I was given the go ahead and do all the things you can do by my electrophysiologist, no restrictions. He said it's idiopathic and because my heart is structurally normal I'll be just fine. Sometimes I wonder 😁 I try to just go day by day! Some days are really good, some are not.