Pulmonary hypertension develops because of
abnormal blood vessels in the lungs, which makes it harder for the heart to push blood through and provide oxygen to the rest of the body.
The researchers studied a group of patients with a rare disease called hereditary haemorrhagic telangiectasia (HHT) that often leads to
enlarged blood vessels in the lungs, similar to varicose veins.
Once your pet goes home after a heartworm treatment, you will need to strictly confine it for another month to prevent fragments of the dead adult heartworms from
obstructing blood vessels in the lungs.
Less common signs of heartworm infection include vomiting, neurologic signs, collapse and sudden death.9 Many cats are able to overcome this phase of the disease process — and in some cases completely clear the heartworm infection — but not without damaging the small
blood vessels in the lungs during the process.6, 7
The dog must be kept confined and his physical exertion kept to an absolute minimum, in order to prevent pieces of the dead worms from being forced by a rapid heart rate and / or increased blood pressure into clogging the
tiny blood vessels in his lungs, causing embolisms.
North American studies of bat deaths and wind turbines have found bats are killed either by being struck by turbine blades or by air pressure changes caused by the turbines that
burst blood vessels in their lungs.
The researchers studied data on 497 patients with
abnormal blood vessels in the lung, known as pulmonary arteriovenous malformations, who were treated at a specialist HHT clinic at Hammersmith Hospital.
After medication is given to kill adult heartworms (called an adulticide), the death of the heartworms can result in severe damage to the lung capillaries (
small blood vessels in the lungs) and loss of blood to the air sacs (alveoli).
It can cause pain and swelling in the leg and may lead to complications such as pulmonary embolism (when a piece of blood clot breaks off into the bloodstream and blocks one of
the blood vessels in the lungs).
This means that the dying worms cause obstructions in
the blood vessels in the lungs.
Caused by the parasite «Dirofilaria immitis», heartworm disease is actually a type of roundworm that settles inside
the blood vessels in the lungs as well as inside the heart.
Mature heartworms can be as long as 12 inches in dogs and live in
the blood vessels in the lungs and in the heart.
PPHN causes newborns to have increased pressure in
the blood vessels in their lungs.