Ive had this. For years. Was diagnosed with SVR too. Given meds. Made no difference whatsoever.
Until I accepted Inhad anxiety. Unbelievably changed over night almost. Please do us a favour and at least explore the possibility of anxiety (dont just throw drugs at it, least lf all anti depressants). I never believed in mindfulness, but if i start feeling PVCs i find it immensley helpful. Was guided through mindfulness through 6 weeks of cbt. It has honestly changed my life.
Went to the cardiologist, had 48 hr tape and an echo. No evidence of svt, no structural issues. Taken off the meds.
I honestly suffered for years, pvcs waking me up in the night etc. If youre having chest pain and throat tightening tol that sounss like an anxiety/panic attack. I had those too. Its a chicken and egg thing, you feel a ovc then panic and get wound up which sets adrenaline through your body and bang...a load more pvc....which makes you panic.. rinse and repeat.
Please take the advice that i and many others have offered. Explore with your gp anxiety! Dont ask or take meds for it. And give it time and practise!!!
Hope you feel better soon.
(Ps, pvc are totally harmless and many people get them when tired, hungry, thirsty or stressed).