The red number on top is his oxygen saturation level. We like it to be as close as possible to 100, and 98 is a fantastic number for Timmy. The green number is his heart rate; this is also a good number for Timmy.
But then a few seconds later, we looked at the machine, and we saw something like this:
And not two seconds later, it was this:
And this continued all night long. Timmy's heart rate was extremely erratic and it went much lower than it normally does. In fact, Timmy went from triggering his alarm only once or twice a night to triggering it about ten times an hour. Timmy's mommy and daddy and I started to get a little bit worried because this was very unusual for him. I pointed out that Timmy had just started a new medicine, and that maybe it was the Zantac's fault. So we decided to skip his nighttime dose to see if he would get better. But he did not improve--all night long the alarm went off, and Timmy's mommy and daddy and I did not sleep much.