Heartbeat on ultrasound photo

Just got back from the hospital and we heard our babies heartbeat, I’m 9 weeks today. I was so happy I cried! The doctor said we had a very healthy heartbeat and to come back at 12 weeks.

However, when I got home and looked properly at the ultrasound photo it says on the side 78(1) BMP. Now from looking at other peoples scan stories and research online this is not a healthy heartbeat and now I’m so worried something is wrong!

Can the scan photo just have the wrong figures written down or has the doctor missed something?