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

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 ?