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.