How Can Heartworms Damage My Pet's Health?
Adult heartworms cause medical problems by clogging
the heart and major blood vessels near the heart.
Heartworms can also interfere with the valve action in
the heart. If heartworms are present, the blood supply
to other organs in the body is reduced, particularly to
the lungs, liver and kidneys. If the heartworm disease
is not controlled, these organs may eventually fail and
your dog may suddenly die during exercise or excitement.
Adult heartworms can also cause the destruction of
tissue of major organs such as the lung, liver and
kidney, leading to coughing, anemia and weakness.
Microfilariae may block blood flow in small vessels.
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