I have a stubborn husband who has CAD, he went out to his car this evening and came back in and couldn't catch his breath. He claimed it was cold outside and he only had shorts on and no shoes. Now, yes it was cool but I still don't know if that was the cause, we checked is oxygen & heart rate off our phone and seemed ok. He has since been sweating laying in bed. I want to take him to the ER to get checked but he insists he feels weird but no chest pain and wants to wait.