Cardiology Concepts A resource for highly technical information on cardiac diseases, including cardiomyopathies http://www.vetgo.com/cardio/concepts/concindx.php
Cardiovascular Veterinary Medicine Dr, Kittleson's (UC Davis) excellent site on veterinary cardiology https://www.vmth.ucdavis.edu/cardio/cases/cases.htm
HCM: Hypertrophic cardiomyopathy Dr. Susan Little's excellent FAQ on HCM for cat breeders. Written in conjunction with top researchers in the field. http://catvet.homestead.com/LectureTexts.html