Yes, PMR can also be associated with Giant Cell Arteritis. This hoarseness can be a symptom of Giant cell arteritis which is a serious condition that causes inflammation of blood vessels especially in the temporalis region of the head and can lead to blindness. Treatment is steroids just like PMR. I am having this problem with my voice. I was just diagnosed with PMR. Giant cell arteritis diagnosis requires biopsy of temporal artery. I’m not doing that since treatment is same for PMR. You should talk to you doctor.