Did you know that heartworm disease can affect cats in much the same way as it does dogs? This disease is a dangerous disease than can be fatal if not caught and treated aggressively. This disease is also 100% preventable if your cat is tested annual and placed on a monthly heartworm preventative medication. So what is heartworm disease? It is caused by foot-long worms or heartworms that invade the heart, lungs, blood vessels and other major organs of a cat. In dogs, there are multiple if not hundreds of the warms invading the organs, but in cats it only takes two or three to do the same amount of damage. In addition to blocking blood flow to vital organs, the heartworms can also cause heartworm associated respiratory disease (HARD). Your best vet Hyattsville, MD can tell you that heartworm treatment is not always as effective in cats like it is dogs.