I got pulled to Peds yesterday evening, and had a six month old baby (was a preemie; born at 34 weeks, so adjusted is about five months) as part of my assignment. The baby had a pretty low heart rate (remember, I'm used to preemies!) that hovered around 100-110. When he was sleeping, though, it dipped down to around 98 or so. I reported it to the oncoming nurse and she said that that was normal for the older babies (our preemies tend to run, more often than not, fairly high...mid 150's, you know...) and nothing to be concerned about. Well, tonight, when I got to work, the night nurse on Peds called up here to ask me if he'd been any lower than that the previous night, because another nurse had reported to HER (another nurse who had been pulled, like I had) that the baby's resting heart rate had been dipping into the low 80's. I told her no, that didn't happen to me, but it got me wondering. Is 80 considered bradycardia in a 5-6 month old infant? I'm working now, and tried googling it, but couldn't find an official word online (just a bunch of links to calculate your ideal resting heart rate, etc.). Anyone?