I am 55, living with heart failure for over 15 years, receiving excellent cardiology care. I am an attorney, who has taken pride in an almost photographic memory since childhood. I am becoming quite forgetful, to the point that is interfering with my professional responsibilities & causing great frustration in communicating effectively. My sharp wit & tongue seem to be failing me. Could it be related to oxygen supply to brain due to heart? Low calcium, vitaminD & early onset of menopause -young 40 s.?