Doubt on gym workout. Please advice.

Hello sir, I see many people are passing away while working out in the gym due to cardiac arrest and other heart related ailments. I do workout at home with weights and also weekly once high intensity workout. Now my family members are worried about my workouts. I seriously enjoy working out and it has become a ritual. If I don't do workout for a week, my body tends to gain weight faster than usual.. Concerned about my family's concern now... Need your advice on what sort of precautions I should be taking.. I workout 6 days a week. Focusing each muscle groups on each day. On Thursday's I focus on hiit. Once a week or month I take alcohol. Apart from that I don't have any other habits. Please advice.. Thanks, Nagesh