My Husband Had Stents Put In About Eight Years Ago

My husband had stents put in about eight years ago he has high blood pressure high cholesterol
He is very hardheaded and doesn't listen to anybody.
He went out to shovel the snow was out there for six hours.
He came in and took a hot bath came downstairs and got a bottle of water by the kitchen sink He Stood There I ask him if he was OK he did not answer his hands started shaking he started moving back-and-forth. I was getting ready to call 911
Then he looked at me and said I'm fine
Then today we went to the grocery store and I wanted him to check his blood pressure it was
162/82. He is on medicine he thinks this reading is OK I'm very scared. He won't call the doctor and he said he is fine is he in danger ?