I hesitate to write this. I'm always afraid that in my attempt to help people, I might cause others anxiety. I do hope this will help though.
Several years ago when my dad went in for his yearly physical the doctor listened to his heart and heard a heart murmur. He went for an ultra sound and they saw that his aortic valve was going to need replacing. They didn't want to do it until my dad started experiencing symptoms, so they waited and were able to monitor it. Almost two years ago he had his open heart surgery and had his aortic valve replaced. They also did a triple bypass, as they found three clogged arteries as well. My dad was 73 years old at the time. He was home from the hospital in about five days. He's doing great. Climbing ladders, fishing, painting the house...you name it, he does it. He never had chest pains or any weird sensations in his chest, his blood pressure was always low, and, he wasn't overweight. The only symptom he had before the surgery was shortness of breath. Now, I'm not talking about the kind we get because we are nervous or overbreathing. So, do NOT get panicky about that. If I thought I was having heart problems every time I breathed weird, I would make myself crazy. My point is...his primary care doctor heard the murmur. They were able to monitor the valve for a couple of years before they felt it was time for the surgery. He survived it and is doing great.
Interestingly, my mom has had chest pains for thirty years, has high blood pressure, has high cholesterol, anxiety (she takes medication for these things), is very inactive...and her heart is completely fine. Go figure.
As long as you go to the doctor and get your yearly check ups, I believe that heart problems can be found IF they are there. Remember, doctors do not want to take any chances, so if they really feel there is something there, they WILL do further testing.