A.B.
Did they check for reflux? A similar thing happened to my son 2 days after he was born and when checking his heart they saw acid in his esophagus. The cardiologist explained that when acid enters the esophagus there is a drop in blood pressure and when the acid leaves the pressure returns to normal. Sure enough, other tests revealed severe reflux, which was then controlled by other means. Thankfully, he never had another episode however, as the other responder suggested, I took a CPR class which helped to make me feel more prepared. Best of luck and enjoy that little boy...