I'm 51, I bike 100 to 150 per week in season, have low blood pressure and weigh 145.
Recently (about 3 weeks ago) I began to have brief episodes; shortness of breath, pressure and pain in my chest. It started out infrequently and then became a daily occurrence. I thought it was a hiatal hernia that was putting pressure on my diaphragm. It came to a head on new years day. Set out to do a 20 miler with my daughter which starts as a downhill and I immediately began to have chest pain. I figured since there was no exertion, it could not be my heart. Finally (without telling her I felt lousy) we cut it short to 10 miles. She thought it was just the rain and cold. Chest hurt the entire way around. Decided that even if it was a hiatal hernia, I wasn't going to let it affect my cycling so I decided to get it checked. Called on Monday morning and made an appointment for Tuesday (obviously, I didn't give the nurse any details). Doc immediately thought heart; I told him he was wrong. Hooked me up to an EKG and didn't like the results. Sent me to a cardiologist who hooked me up to an echo cardiogram and didn't like the results. Admitted me for an angiogram, found 95% blockage in a main artery and put in a stent.
Obviously, i'm very lucky they found it before I did any damage and I feel better than I've felt in years. I'm waiting for some good weather to get back out there. My daughter's reaction when my wife told her I was in the hospital and it was happening during our ride? I thought I was finally getting faster than him!