My cardiologist looked at my stress echo and told me I'm safe with aerobic exercise so long as I keep my heart rate below 140 - based on my blood pressure readings at that level. I used to push it higher- but not hard to stay below that. No problem with flying. Biggest concern is blood pressure- and he had me buy my own cuff so I can take it regularly. also no heavy lifting no holding of breath when I lift or do other exercises. Mine is 4.8. Waiting on DNA results... if those are negative will get checked again in 9 to 12 months.