HHT Canada THH – It is our mission to support the Canadian HHT patient community. HHT Canada THH is a volunteer based organization that aims to raise funds to educate patients and to support HHT research in Canada. We invite you to browse our site to learn more about HHT and the care available in Canada. This site contains information for Canadians with HHT, concerned family members and physicians involved in the care of patients with HHT.