Here's What You Should Know About Excessive Blood Clotting in Cats


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Healthcare research suggests that there could be various medical conditions responsible for excessive blood clotting. Also, blood clotting is usually related to heart disease. โ€œSaddle Thrombusโ€ is a common blood clot found only in cats. This kind of blood clot could interfere with the leg movement of a cat and also causes excruciating pain in the animal.


When a blood clot causes blockage in the lung arteries, it could lead to serious breathing problems. Some of the common symptoms of this type of blood clotting may include poor energy, fever and rapid breathing. When a blood clot obstructs the blood flow via the aortic artery (major artery carrying blood from the heart to different body parts), the symptoms include sudden paralysis or weakness, cold limbs, weak/no pulse, pain in limbs and purple/blue colored nails.It is possible for a blood clot to be formed inside a blood vessel (thrombus) or the heart. It may travel inside the bloodstream-a condition termed as โ€˜embolismโ€™. When the entire blood clot or a part of it gets dislocated from its original position and starts travelling inside the bloodstream, it is possible for it to get settled in another location. This scenario is also termed as โ€˜thromboembolismโ€™.As far as cats are concerned, the most commonly identified blockage point is in its lower abdomen. It is here that the aorta disintegrates to offer blood supply to the hind legs.


Excessive blood clotting (hypercoagulability) could be due to abnormally sticky blood platelets. Other causes of excessive blood clotting may include:

  • Antithrombin deficiencies- a naturally occurring anticoagulant which prevents blood clotting in veins and arteries
  • Defective fibrinolysis
  • Protein-losing nephropathy- protein loss in the intestines resulting in lack of anticoagulant/anti-clogging proteins
  • Under functioning of the thyroid gland
  • Pancreatic inflammation
  • Parasite infection, especially with Dirofilaria
Diagnosis and Treatment

The veterinarian will do a thorough examination of your cat to diagnose a blood clot. Diagnostic imaging and lab work are usually performed for accurate diagnosis of a blood clot. These exams may also help identify any underlying heart-related condition and for eliminating other potential health problems.To put it simply, a comprehensive diagnostic exam may include the following:

  • Complete blood count (CBC)-helps detect blood-clotting factors and anemia
  • Biochemistry profile
  • Chest x-rays-for evaluating lung condition and heart size
  • Urinalysis
  • Doppler test-for checking blood flow in the hinds

The veterinarian may advise hospitalization for the cat (if necessary) in order to implement fluid and anticoagulant therapy. Your cat might be restricted from all kinds of activities till there is a reversal of the condition. Bed rest is highly recommended when there is a blockage in the artery due to a blood clot.

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