Check out this list of dog breeds affected by common heart disorders.
Atrioventricular valvular insufficiency
Afghan hounds
American cocker spaniels
Beagles
Bull terriers
Boston terriers
Cavalier King Charles spaniels
Chihuahuas
Dachshunds
Fox terriers
German shepherds
Great Danes
Japanese Chins
Maltese
Miniature and toy poodles
Miniature schnauzers
Dilated cardiomyopathy
Airedales
American and English cocker spaniels
Boxers
Dalmatians
Doberman pinschers
Golden retrievers
Great Danes
Irish wolfhounds
Labrador retrievers
Newfoundlands
Old English sheepdogs
Portuguese water dogs
Saint Bernards
Scottish deerhounds
Springer spaniels
Hypertrophic cardiomyopathy
Pointers
Source: Ackerman L. The genetic connection. In: Ettinger SJ, Feldman EC, eds. Textbook of veterinary internal medicine. 6th ed. Philadelphia, Pa.: Saunders, 2005.