<s>[INST] Hi. My daughter is a over 20 months old and tonight I happened to notice that when I put my hand on her chest, I could feel her heart beating. It felt like it was beating hard and fast. This is the first time Ive noticed this. Is this normal for a baby her age? [/INST] Hi, I can understand your concern. The normal heart rate for a baby of around 20 months will be between 90-110 beats per minute. There might be variations in rate with crying, playing, sleeping, post meals, fever, deny Chat Doctor.  Chest wall of baby is comparatively thin, it is normal to feel heart beat with palm even in adults. So don't worry about it. You can monitor heart rate, activity of baby, watch for fever and any other symptoms. If any then consult your Pediatrician. Hope this helps you, if so do vote. </s>