My grandson has bubble in lung and was surgically removed. This has not happened in my family. Will the condition repeat? Is he in dnger?

MY SON BP IS 117/57,I HAVE DONE CT SCAN DUE TO HIS INJURY INFOREHEAD IN REPORT FINDING SUPTATENTORIAL VENTRICULES ARE MILDLY DILATED &MUCOSAL THICKRNINING NOTED IN BOTH MAXILLARY AND ETHMOID SINUS I WANT TO KNOW IS IT HEART IS NORMAL

My father is having pulmonary fibrosis can there any solutions of it or any solutions to prevent it further

Hello Doctor, My father is 68 and he had undergone a heart bypass surgery in 2018 after a heart attack. He was doing all fine until last month, he complained of breathlessness. When admitted to hospital we were told that he has heart failure and his heart is not pumping enough and that's the reason his lungs were filled with fluid. He was treated for 3 days and he was put on ventilator and discharged. Now I am little worried that doctors have advised him to not to do any heavy tasks and not even long walking etc. Also they told us that this condition cannot be cured and he has to live with it. Could you please tell us if there's something I'm missing and is there any treatment or advice from you for this? Also he is complaining more of indigestion, is this related to heart failure? Thank you.