Wow! I just came across this post when researching what is triggering my newly diagnosed SVT suddenly. Started very mildly in Jan 26. Wore holter monitor for week and caught some irregularities. Took couple months to see cardiologist at end of April. During this time episodes very infrequent and didn’t last long. Then cardiologist switched my blood pressure medication around same time I had viral infection and pcp put me on steroids. I ended up in ER five days later on May 27. Heart racing non-stop for hours, sky high BP and anxiety like crazy. ER doctor said my heart was ok and that steroids triggered and very bad for SVT. Said should feel better once steroids out of my system. Few days later I started to feel better. Still had episodes but not all time and not bad until this five days ago. Started picking up again and got really bad that I could sleep. Been like this for days. I’m mostly good during day while at work but in evening and when lie down it cranks up. I’m sure the stress and anxiety cause by it doesn’t make it better. I also realized that some other medications i recently started might trigger. It is so frustrating and my cardiologist isn’t very responsive (only saw him the first time in end April) so I might be looking for new one. After reading your post I realized that I too had Covid in Dec 25 and this started about a month later. My heart just feels like it is going to beat out of my chest and my chest is sore and it can last for hours. Last night for several hours before finally fell asleep but only slept about four hours then up again. Does anyone notice it happened more while lying down or at night? Thank you every who commented. Does make me feel like I’m not alone even when my family doesn’t understand. Prayers!