3-year-old is noted by pediatrician to have a low resting heart rate

Case

Hi, thanks for taking my call. I have a 3 year-old boy in my office today who I am seeing for a well-child check. I have been following him since he was born and he really hasn’t had any issues. His parents are great and come in for routine follow ups. He is keeping up with his developmental milestones and he is up to date with all his immunizations. But I am listening to him today and his heart rate seems kind of slow. I don’t know what to make of it. His parents say that he is an active three year old and has lots of energy. They have noticed nothing out of the ordinary or concerning to them- but this heart rate just gets me. When I count it out, I get a rate of 70 bpm at rest. We have a blood pressure machine here and he has a normal blood pressure for age, but it reads a heart rate of 65 bpm! What do you think? Should I send him to you for evaluation? Am I missing something?