Disorder - CardiomyopathyOrgan Systems Involved
Heart Disease, Hypertrophic in the dog
Canine Hypertrophic Cardiomyopathy
Affected animals show a dilation of all the chambers of the heart with some increase in the heart muscle mass (hypertrophy) and a reduction in the contracting abilities of the ventricles.
The degree of weakening of the heart wall has been found to relate directly to the severity of symptoms; weaker walls result in a reduced volume of blood being pumped around the body. Hence, symptoms would be likely to vary depending on the severity of the weakening. Some affected dogs show no clinical signs and have no history of physical problems. Other cases, however, may show clinical signs such as fatigue and possibly collapse, coughing, shortness of breath, heart murmur, heart failure or sudden death, most commonly during or immediately following exertion. Additional clinical signs depend on whether it is right sided or left sided heart failure but may include abdominal distension, anorexia and weight loss.
Dogs at Risk
American cocker spaniel
German shepherd dog
Old English sheepdog
Portuguese water dog
Further Reference Material [OMIA Number]