Angiography and UltrasonographyThese kinds of imaging are rarely utilized in the identification of canine heartworm disease outside of referral practices and teaching associations. Angiography is a technique that permits visualization of blood vessels in your system by taking radiographs within minutes after injecting a contrast material (dye) into those blood vessels. In canine heartworm disease, angiography is used to study changes to the pulmonary arteries. Worms may be visualized on the angiogram as filing flaws. Ultrasonography (echocardiography) was used to evaluate enlargement of the heart chamber and also to search for the presence of heartworms in the ideal ventricle or primary pulmonary artery.Necropsy (examination after death)Though necropsy is probably the most definitive diagnostic evaluation, it's hoped that it never reaches that stage. Heartworms are often found in the ideal ventricle of the heart or at the major pulmonary arteries, occasionally in its ventral divisions. Occasionally heartworms may be found in organs aside from the lungs and heart but such illnesses are infrequent.
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