Good evening, girls) tell me, is anyone having problems with EKG?

Good evening, girls) tell me, is anyone having problems with EKG? The situation is that the heart rate is often 140, but it doesn't really rise much when I move. My little one doesn't like the sound at all, and he quiets down. Doppler good, without any complaints. They threaten to put him in the hospital. Here I think, there are so many of us ? and maybe someone will give some advice ?