I have heart disease.Had a triple bypass in 1999 and 7 stents between 2005 and 2007. I am very fit and do 1hour cardio 5 times a week.Also have a class c 36mm hiatus hernia.My issue is that I sporadicaly get a feeling of angina when I exersize...? Could this be the hernia? If it is my heart should I not get angina each time I exercise?