My HCM was diagnosed when my primary care physician noted a murmur in my mitral valve for the first time. We "watched" it for a couple of years, and I was referred to a cardiologist when it persisted. I had tests including an echo, stress, nuclear stress, and I cannot remember what else, the result was that I had HCM. I had absolutely no symptoms for at least 10 years. As the thickening increased to some point, symptoms appeared, and I eventually needed surgery. @phillymom, can you suggest to your cardiologist to order a heart monitor? ASAP. A stress test? I am not a doctor, but nonprofessional logic and because of how my own HCM progressed, those were the tests that helped me to progress along the treatment continuum. If you are unhappy with how your cardiologist is taking your symptoms, perhaps it is time for another opinion. Good luck and let us know how things are working out!