www.yourcatsheart.com: An excellent website for cat owners that describes the clinical signs of heart disease in cats, the most common diagnostic testing and a brief overview of hypertrophic cardiomyopathy (HCM).
www.yourdogsheart.com: An excellent website for dog owners that describes the clinical signs of heart disease in dogs and provides a summary of degenerative mitral valve disease and dilated cardiomyopathy (DCM).
www.acvim.org: The website for the American College of Veterinary Internal Medicine. Pet owners are able to locate a veterinary cardiologist anywhere in the country using this site.