Dogs can live for at least six to seven months after becoming infected with heartworms. This is because it takes that long for adult heartworms to grow. However, determining the exact date of infection is challenging.
Heartworms can significantly impact your dog's life expectancy. The severity of the infection and the length of time your dog has been infected can affect the outcome. In some cases, heartworms can cause sudden death, while in others, they can lead to chronic health problems that can shorten your dog's life.
Not all dogs with heartworm disease develop caval syndrome. However, if left untreated, heartworm disease will progress and damage the dog's heart, lungs, liver, and kidneys, eventually causing death.
Dogs with heartworm disease can live high-quality lives as long as they are given appropriate care. After completing treatment and following your veterinarian's recommenda- tions on heartworm disease testing and prevention, the chances of any long-term effects are very low.
Dogs that have a high number of heartworms often develop symptoms such as pronounced and persistent coughing, difficulty breathing, and exercise intolerance. In more severe cases, dogs may also experience fainting or collapse, pale mucous membranes, weakness, elevated heart rate (tachycardia) and severe lethargy.
Signs of heartworm disease may include a mild persistent cough, reluctance to exercise, fatigue after moderate activity, decreased appetite, and weight loss. As heartworm disease progresses, pets may develop heart failure and the appearance of a swollen belly due to excess fluid in the abdomen.
Is heartworm painful? - Animal Hospital of Statesville. It's not painful, per se, but they feel sick, uncomfortable, and they're likely having difficulty breathing. They're not perfusing very well, so they don't feel well.
Six months after they bite your dog and inject those larval microfilariae heartworms into your dogs, it takes that six months for them to develop into that adult worm. So generally, it's anywhere from six to 12 months after they've been bitten; you may start noticing signs in your pet.
Prognosis: heartworm treatment success rates
With the three-dose adulticide protocol described above, in conjunction with doxycycline and macrocyclic lactones as recommended by the American Heartworm Society, 98% of dogs will be cleared of heartworm infection.
After treatment, the adult worms die and are carried by the blood to the lungs where they lodge in small blood vessels. There they decompose and are absorbed by the body over a period of several months.
Restrict exercise.
But your dog's normal physical activities must be restricted as soon as the diagnosis is confirmed, because physical exertion increases the rate at which the heartworms cause damage in the heart and lungs. The more severe the symptoms, the less activity your dog should have.
Restrict exercise– no running, walks for exercise or rough-housing. Generally speaking, it's ok to walk your dog outside to use the restroom or to sit outside to enjoy the weather, but no walks (short or long) for exercise. Your veterinarian may have alternative recommendations.
No medication is approved to kill adult heartworms in cats, and treatment is aimed at reducing worm-associated inflammation and managing clinical signs. Unfortunately, adult worms can take several years before they die on their own, and inflammation and scarring may become permanent.
With heartworm disease treatment can be extremely difficult even for the young otherwise healthy dogs but our senior dogs can see more severe side effects and death if progressed disease is present. Know that 1 in 10 dogs will develop some form of heart disease as they age.
Middle to late-stage symptoms of dog heartworm include:
Enlarged liver or heart. Panting at rest. Exercise intolerance. Fluid backup into the lungs and abdomen.
If given to a heartworm positive dog by accident
If the larval worms die too quickly, a shock-like circulatory reaction can occur so for this reason the American Heartworm Society recommends that the first dose of ivermectin be given under veterinary supervision.
The only product currently available for the treatment of adult heartworms is melarsomine dihydrochloride (immiticide). During treatment, the patient receives an intramuscular injection deep in the lower back muscles. This is a painful injection and it is common for the patient to be quite sore at home afterwards.
Because heartworms must be eliminated before they reach this adult stage, it is extremely important that heartworm preventives be administered strictly on schedule (monthly for oral and topical products and every 6 months or 12 months for the injectable).
Stage 4 – Heartworms have caused severe damage to the animals heart, lungs, liver, and kidneys. In this stage, Caval syndrome is likely. Caval syndrome is when there is such a large amount of worms blocking blood flow to the heart that it creates a sudden life-threatening problem in need of quick surgical intervention.
Rest and exercise restriction is extremely important after heartworm treatment in order to lessen the possibility of complications. Dogs should only go out for potty breaks while on a leash. There should be no physical activity for 6 weeks or until cleared by the veterinarian. No play, no running.
Discussion. Hemoptysis (expectoration or coughing up of blood) has been reported as a consequence of severe heartworm infection in dogs,2-6 although it remains a relatively uncommon finding. Even fewer reports exist of dogs coughing up or vomiting up adult heartworms.
Some dogs may feel nauseated from their heartworms as well, and may vomit often just because they feel so sick with the disease. Vomiting does not occur in every dog that has heartworms.
The average cost of heartworm treatment for dogs can be upwards of $2,700 — and potentially thousands more if surgery is needed. If your pet has been diagnosed with heartworm, treatment varies greatly depending on whether you have a dog or cat.