Hello! Thank you for asking on HCM! I recommend a medical check up, with a careful physical exam resting ECG and cardiac ultrasound to rule out any possible cardiac dysfunctions (cardiomyopathy, valvular heart diseases, pericardial disease, arrhythmia, etc). Elderly people are more prone to show exaggerated response effects to antihypertensive drugs. Doses must be carefully down titrated, and if possible diuretics and beta-blockers use be re-evaluated. Thorough investigation for co-morbidities would elucidate medical reasoning about this matter. A visit to her cardiologist, and a discussion about the above issues will be helpful to clarify your concerns. Hope to have been helpful to you. Greetings! Dr. Iliri.