Sorry to hear what's going on and I understand how you may feel. Actually both my grandfather and I have had open heart surgery for different reasons that I don't really feel needed to be discussed in open, but it really isn't fun when a family members goes through it. I pray for their health. Hopefully things work out for your family.
Yes, you should always have an hour with exercise every day and have small meals but eat more often. A year ago I ate really unhealthy and never did any exercising. That lead to not having any energy at all and my body was always hurt after walking a small distance.
I hope you and your family will not go through something like that again. Have a great time in Peru.
Eating healthy and living an active lifestyle is certainly a great way to mitigate heart problems. If anyone needs help or motivation to start running, let me know.