33 year old male here with some recurring OCD-ish anxiety about something really stupid I did ~2 years ago.
Unfortunately, I received a sample packet of an unknown substance with some legal herbal smokes, which turned out to be a powerful stimulant that sent me into a panic attack for several hours.
Over the course of the next 8-10 hours, I had constant tachycardia between 120-150bpm. The peak (150bpm) lasted roughly an hour, with the rest of that time under 140. After some insomnia, I slept for almost 48 hours after that and felt generally exhausted and sore (like I exercised way too hard) with a headache and general feeling of unwellness, etc., but recovered quickly after that time.
A few years later, I'm doing generally great...eating better, exercising every day without issue, losing some excess weight, etc. But every once in a while, I think about that experience, and can't help worry, "What if I damaged my heart?" I've had physicals, etc., and never had any heart problems so to speak (I monitor my pulse when I exercise, and it's normal). I also learned my lesson and no longer mess with any type of legal high (or illegal for that matter) - it was a frightening experience. But I've never told anybody about this, and I still worry from time to time.
So, to sum up, what are the chances that in an otherwise healthy person a sustained heart rate of 120-150bpm over 8-10 hours will cause any permanent/long-term damage? Since I seem to be fine a few years later, do I have anything to worry about?
I have searched around - I just can't find any stories with heart rates that *stayed* up like this for that long, as most tachycardia is intermittent, and I'd like to put this recurring anxiety about this experience behind me.
THANK YOU SO MUCH for any answers you can provide!