Hello. Thank you for asking on HCM. I carefully read your concerns. It is important that you mentioned the fact that this happens while walking. If she complains about it, it means this shortness of breath is making her upset. There are certain, major lung and heart diseases that present with shortness of breath. My index of suspicion is moderate at this phase, but I would recommend a visit to the cardiologist and performing an EKG, echocardiogram and a cardiac stress test. Also, blood tests would be helpful. You see, sometimes, the coronary artery disease does not present with angina, rather with non-specific symptoms, like shortness of breath. In this case, it would be called cardiac dyspnea. About the high blood pressure, if it is diagnosed and established, then I assume she is on treatment. I would recommend adding another agent to the therapy, if the BP figures are constantly high. Furthermore, it is important to restrict salt in diet. I hope I was helpful. Take care.