My Boyfriend Is 70 Years Old And Has Had Three

My boyfriend is 70 years old and has had three ablasions for afib. He has had many episodes but not recently. He had some heartburn, not nausea. His blood pressure one hour ago was 174/124 and pulse 112.
He thinks if he lays down for a while it will go back into rythym. I am
very concerned but he says not to over-react and wait a while longer.