Do you red line and is that good for the heart

Hi all

Maybe that’s a dumb question. But I am close to 45 male. 2 years ago had a very mild MI. Since then I have been back working out and making sure I stay active.

I joined a gym in the last year that is mostly group classes. One some days of the week they have HITT workouts. Today I got up to 180 bpm. Literally at 100%.

Is that good or bad?