What causes the death of a dog due to heartworm disease?
answer Heartworm disease may cause a combination of medical problems within the same dog, including heart, lung, kidney and liver disease. The worms are found in the right side of the heart, and in the major vessels that bring blood to and from the right chambers of the heart. The worms cause inflammation of the blood vessels and can block blood flow leading to pulmonary thrombosis (clots in the lungs) and heart failure. Heartworm disease can also lead to liver or kidney failure, causing death by one or a combination of these problems.