What smoke can do to you

My co-worker husband was admitted in the hospital few weeks ago. He was feeling nausea, heartburn and had a difficult breathing. Anyway, he had so many health problems before and try to ignore it. He was rushed in the emergency and they found a blockage to his heart was about 80%. So glad they made him to hospital before it's too late. After few days been the hospital and undergoe surgery they went home and he start lite his cigars again. That cause him to go back in the hospital for losing his breath. I think he finally decided to quit smoking to avoid going back ang forth in the hospital