I wouldn't worry about 80 beats per minute, 55 up to 75 is pretty normal.
If your body is under stress heart rate increases to optimize your chance of survival....breaking bones is definitely a form of stress as is the pain that goes with it. Your body naturally responds, it doesn't know you intentionally broke and put a man-made device in it to make it longer.
Blood thinner? Yeah, of course heart rate increases to keep proper oxygen rates and minerals through the brain etc. Same with blood pressure if it falls too far down heart rate increases to compensate in attempt to keep your body where it needs to be to survive.
Once your body is fully recovered you should return to normal. I wouldn't worry about it in the meantime unless it exceeds 90-100+ and/or you can feel the stress of it working hard in your chest especially when laying down.
Me personally, I had near-fatal exposure to mercury when I was 15 and have suffered major permanent nerve damage. My chest always beats so hard I can feel it 24/7 and my heart rate is always 100 to 120. If I walk on a treatmill even for 5 minutes it goes to around 180-200. I technically should drop dead at any point as they can't fix the nerve damage, but I'm still alive here at 35 years old so I survived 20 years so far.
So yeah, don't even worry about it totally normal and should not harm you. 