What brings you here, today? The top 10 feline medical problems of 2014

Dr. Brooks examines a pediatric patient

If you have had a cat for any length of time, you have probably had to take him or her to the veterinary hospital for something other than an annual checkup at least once - anything from a bite wound from another cat to a broken toenail; stuffy noses, runny eyes or even (every cat owner's nightmare) choosing to urinate outside the litterbox.

Have you ever wondered, while sitting in the exam room waiting for the doctor, what other visitors to the hospital are bringing their cats in for? Veterinary Pet Insurance analyzes their claims each year, which can give us a good idea why most people are bringing their cats in to see the veterinarian. Last year, the top 10 reasons that cats visited the veteirnarian for a health issue were:

Cancerous cells typical of lymphoma

10) Lymphoma: a common and treatable form of cancer that affects one of the white blood cells (lymphocytes) and lymph nodes of a cat



9) Upper respiratory infection: Many young cats and kittens visit us because they are sneezing or have a runny nose or watery eyes. Some cats that have been affected by an upper respiratory infection as a young cat may have chronic but fairly manageable problems for the rest of their lives.

8) Inflammatory Bowel Disease: IBD is not a single disease but a complex group of symptoms and conditions that result from increased inflammation in the digestive tract. This condition can cause problems with digestion and absorption of nutrients, susceptibility to bacteria and viruses in the intestinal tract, vomiting, diarrhea, weight loss, poor hair coat, increased production of hairballs and more. For more information, you can read our blog article on IBD, here.

Drawing up insulin injections for a diabetic cat

7) Diabetes: Middle-aged to older cats, especially males and overweight cats are at higher risk for diabetes. As the obesity problem in US pets grows, the prevalence of diabetic pets has also increased. Almost 60% of cats are overweight in the United States, according to data collected by the Association for Pet Obesity Prevention (APOP) last year (2014).  For more information, you can read our blog article on diabetes, here.

6) Diarrhea or intestinal upset: Sometimes caused by intestinal parasites, diarrhea can be any stool that is soft or not well-formed, whether the cat can make it to the litterbox or not. Other causes of diarrhea may include diseases such as thyroid disease, IBD, or other problems, such as constipation (oddly enough), or eating a non-food item, such as a toy or ear plug.

5) Excessive thyroid hormone: Overactive thyroid glands produce more thyroid hormone than necessary, which can cause symptoms such as increased hunger and thirst, rapid heart rate, hyperactivity, vomiting, diarrhea and weight loss. For more information, you can read our blog article on hyperthyroid disease, here.

4) Vomiting/upset stomach: Vomiting may be related to an underlying medical issue such as thyroid disease, or may be caused by a food allergy, ingestion of a non-food item, a hairball that has become stuck in the digestive tract, heartworm disease, constipation or other problems.

3) Chronic kidney disease: A common problem in older cats is a progressive decrease in kidney function which can cause symptoms such as weight loss, vomiting or nausea, poor appetite.  For more information, you can read our blog article on Chronic kidney disease, here.

Annual oral exams help prevent serious dental disease

2) Periodontitis/dental disease: About 85% of cats over the age of 3 years have some amount of dental disease. Imagine the state you might be in if you didn't brush your teeth for three years or more! Most cats will need some level of dental care at some point in their lives. Just like people, a lot of a cat's dental health is related to genetics - enamel strength, tolerance of bacteria in the mouth, but regular dental checkups and cleanings can help prevent severe dental disease. For more information, you can read one of our blog articles about dental disease, here.

Making sure your cat likes the litterbox can help prevent urinary issues

1) Bladder or urinary tract disease: Just like VIP, the most common reason that we see cats for
medical care at Exclusively Cats is due to bladder or urinary problems - often because the cat has started to urinate outside the litterbox. There are many reasons that a cat might develop litterbox issues, many of which are medical and none of which are due to revenge or spite, despite what many people think or feel. As Dr. Deporter at Oakland Veterinary Referral Service is fond of saying, a cat's urine marking behavior is like leaving a sticky note with important information in a certain area. When we go by and clean up the urine without looking for the root of the problem, we are removing valuable cat information from the spot. This means the cat feels the need to re-post the sticky note - and they will continue to do so until the problem is addressed. The cat can read the "sticky note", other cats can read the "sticky note", but we humans cannot read the "sticky note" and need to use other means to figure out what the cat is trying to tell us. Sometimes it may simply be "Hey! My litterbox is stinky!" other times it may be a different cry for help. For more information, please read the 4 part series of blog articles that we have prepared on bladder and litterbox issues which begins here. 

How could my cat be sick? He acts like a kitten! - Hyperthyroid disease and your cat

THE MANY FELINE FACES OF HYPERTHYROIDISM 

What is hyperthyroidism?

The thyroid is a gland located in the neck. It plays a very important role in regulating the body's rate of metabolism. Hyperthyroidism is a disorder characterized by the overproduction of thyroid hormone (thyrotoxicosis). When excessive amounts of thyroid hormone are in the circulation, the body's metabolism speeds up greatly.

Location of the thyroid gland

 

1: Normal thyroid gland. 2, 3: parathyroid glands. 4: enlarged thyroid gland

Hyperthyroidism is a fairly common disease of older cats. It is estimated that about 5-10% of cats will develop hyperthyroidism in their lifetimes. Although the thyroid gland enlarges, it is usually a non-malignant (benign) change.  Less than 2% of hyperthyroid cases involve a malignant change in the gland.

What does this do to the cat?

The typical cat with hyperthyroidism is middle aged or older; on the average, affected cats are about 13 years of age. The rapid rate of metabolism causes 95-98% of cats with this disease to lose weight. The cat tries to compensate for this with an increased appetite. In fact, 67-81% of these cats have a ravenous appetite and will literally eat anything in sight! Despite the increased intake of food, most cats gradually lose weight. The weight loss may be so gradual that some owners will not even realize it has occurred.  Affected cats usually drink a lot of water and urinate frequently. There may be periodic diarrhea or vomiting, and the hair coat may be unkempt. As the disease progresses, the cat's appetite may decline to the point of anorexia.

In addition to:

• weight loss
• increased appetite
• vomiting
• diarrhea
• unkempt coat

other signs of hyperthyroidism that may be noticed include:

• increased thirst
• increased or more frequent urination, larger clumps in the litterbox, or inappropriate urination outside the litterbox
• increased activity
• increased vocalizations 
• pacing or restlessness
• anxiety
• panting or rapid breathing

How is hyperthyroidism diagnosed?

The disease is most commonly diagnosed by determining the blood level of one of the thyroid hormones; the hormone most frequently measured is T4. Usually, the T4 level is so high that there is no question as to the diagnosis. Occasionally, a cat suspected of having hyperthyroidism will have T4 levels within the range of normal cats. In this case, a second test, called a T3 Suppression Test, is performed. If this is not diagnostic, a thyroid scan can be performed at a veterinary referral center.

Hyperthyroid cat before becoming hyperthyroid, and again at the time of I131 treatment

Is this disease treatable?

Because less than 2% of these cats have cancerous growths of the thyroid gland, treatment is usually very successful.  There are three choices for treatment; any one of them could be the best choice in certain situations.  Many factors must come into consideration when choosing the therapeutic option for a particular cat.

What would happen if I chose not to treat my cat's hyperthyroidism?

Hyperthyroid is a deadly disease if left untreated. The effects that hyperactive metabolism has on the body are progressive, and this is a disease that will not resolve on its own. Over time, a cat that is hyperthyroid will develop problems associated with malnutrition because the overactive metabolism is using up calories and nutrients more quickly than usual. Add to that the likely side effects of vomiting and diarrhea, and an untreated cat will also become severely dehydrated.

The increased heart rate of a hyperthyroid cat will cause the heart muscle to thicken, and many will develop cardiomyopathy (poor muscle contractions) and eventual congestive heart failure. The high blood pressure that often goes hand in hand with hyperthyroid disease can cause damage to many sensitive organs in the body, including the kidneys, the eyes and the brain - as these blood vessels rupture from constant high pressure, blood supply is lost and tissues become unhealthy. This can cause kidney disease, neurologic effects due to damaged brain tissue, and blindness if the eyes are affected.

1) Radioactive iodine.  Probably the safest, and definitely the most effective way to destroy the abnormal tissue is with radioactive iodine (I131) therapy. In 95% of cats treated with I131, the cure is complete and permanent. Radioactive iodine treatment for cats requires one to three weeks of hospitalization at a veterinary clinic licensed to administer radiation therapy, and involves administration of the iodine via injection or oral capsule. The iodine is concentrated in the thyroid gland and destroys the overactive cells. At Exclusively Cats Veterinary Hospital Cats RadioIodine Treatment Center, the cats are treated with an oral dose and isolated for one week at the hospital followed by one to two weeks of isolation within the home.

Here is a vivid demonstration of a cat before and 3 months after treatment.

2) Surgery.  Surgical removal of the affected thyroid lobe(s) (thyroidectomy) is also very effective.  Because hyperthyroid cats are usually over 10 years of age, there is a degree of anesthetic risk involved, but not necessarily any more risk than for other cats of similar age.  However, the risk is much less than most people think, as long as the cat is otherwise healthy.  Tests are done before surgery to evaluate the cat and predict the chances for complications. If the disease involves both lobes of the thyroid gland, two surgeries may be required, depending on the surgeon’s choice of procedures.  In many cats, only one thyroid lobe is abnormal, so only one surgery is needed. Possible side effects include possible damage to the parathyroid gland, which is intimately associated with the thyroid gland, possible post-surgical hypothyroidism (under-functioning of the remaining thyroid gland, or as a result of bilateral thyroid removal).

3) Oral medication.  Administration of an oral drug, methimazole, can control the effects of the overactive thyroid gland.  After starting the medication, results can be seen in just 2-3 weeks. Some cats have reactions to the drug, but that number is fairly small (less than 20%). However, the side effects may begin as many as six months after the beginning of treatment and can include vomiting, lethargy, anorexia, fever, and anemia. Less frequently, cats may develop facial itching, clotting disorders and liver malfunctions. Methimazole does not destroy the abnormal thyroid tissue, but rather prevents the production of excess thyroid hormone.  Therefore, the drug must be given for the remainder of the cat's life. If the medication is stopped, hormone production will return to high levels again and the cat's symptoms will return.

Some cats can be particularly difficult to regulate, or may be poorly sensitive to this medication, which can be a downside to choosing this method of treatment. Other cats are difficult to medicate and would be better served by I131 treatment. Methimazole is a medication that some cats metabolize well in a transdermal form, but this option is not tolerated by all cat, and there is some risk to the owner in applying a thyroid-inhibiting medication that is absorbed through the skin, so appropriate handling of the medication is important, and transdermal medication may not be an appropriate choice for cats living in a home with small children. Periodic blood tests must be done to keep the dosage regulated. This type of treatment is appropriate for the cat that is a poor surgical risk due to other health problems.

4) Hill's Y/D diet.  Because the thyroid gland needs iodine to make thyroid hormone, feeding a diet with minimal iodine content should decrease the thyroid hormone levels of the cat. Feeding trials have indicated that after 3 weeks of feeding ONLY this diet - no treats, no human foods - thyroid levels are significantly reduced in most cats. Cats will not become hypothyroid while eating this diet, and a two year study suggests that cats that are NOT hyperthyroid that eat this diet will not suffer adverse effects. However, in practice, we have had a very difficult time getting cats to eat this diet, so while it is an option, it is a pricy (4 pounds of food is about $25 dollars and lasts about 3 weeks for a 7 pound cat) experiment that may not always pan out. There are many people who have had excellent results with this diet change, however, so it is definitely a viable treatment option. This treatment is not curative and the cat will need to remain on this diet for the rest of its life.

How Y/D diet works

If I elect to have surgery for my cat, what is the procedure?

If surgery is the treatment method chosen, the cat is put on methimazole for one to four weeks before surgery. This treatment should cause the ravenous appetite to subside, and your cat will probably gain weight. Some cats also have a very fast heart rate and may be medicated before surgery with another drug, such as Atenolol. After one to two weeks, another T4 level in the blood is measured.

The operation is performed in a sterile operating room and your cat is under general anesthesia. An incision is made along the neck just below the throat and the enlarged thyroid gland is removed. The skin is sutured together.

Your cat is generally hospitalized for one night following surgery and returns home feeling quite well. He or she should eat normally after returning home. 

Can hyperthyroidism occur again?

Recurrence is a possibility in some cats. Recurrence is uncommon after radioactive iodine therapy.  When surgery is performed, the chance of recurrence is slightly greater. It is usually not possible to surgically remove all of the cells from the abnormal thyroid gland. If those remaining cells grow, the disease may recur. However, this occurs less than 10% of the time and usually after 2-4 years.  Another possibility is that one side of the thyroid gland appeared normal at the time of surgery so it was not removed. Then, months or years later, it may become abnormal.

I think my cat is too old for anything but treatment with the oral medication or diet change.  Do you agree?

Many owners of cats with hyperthyroidism are hesitant to have radiation therapy or surgery because of their cat's advanced age. But remember, old age is not a disease. The outcomes following both surgery and radiation therapy are usually very positive, and most cats have a very good chance of returning to an excellent state of health. Some of the cats referred to our hospital in Waterford, Michigan, for radioactive iodine treatment have been as old as 20 years of age, and have done very well!

Blanco: The Trials and Tribulations of a Battle-Scarred Tomcat

Blanco is a 15 year old neutered male cat. He appeared, one day, and won the hearts of a family with his rough and tumble scruffiness. He was several years old at the time, and you could read his past like a newspaper on his raggedy coat. He was probably about 5-6 years old when he was taken in, neutered and tested. He was also FIV positive - not surprising, since he was a battle-scarred un-neutered male wandering the streets. However, he was otherwise healthy, and his FIV positive status did not deter his family. They confirmed that he was positive with an IFA test, and then continued to treat his battle wounds.

Dermatitis of Blanco's ear

All four of his canine teeth were fractured from fighting, and one was infected. The other three had broken far enough down the tooth that the canal to the nerve and blood supply was open and at risk for infection. He was scheduled for dental care, and lost a total of 10 diseased teeth, and 4 more teeth were discovered to be missing. He also got a microchip.

After his dentistry, his owners noticed that he was no longer "teething" and chewing on things around the house.

Dermatitis of Blanco's nail beds

Starting in 2011, Blanco began to have issues with itchy skin. He ran through several different antibiotics and tapering doses of steroids, before his dermatitis responded well to a combination of Prednisolone and Atopica. Since that time, he has been comfortable in his skin.

Later in 2011, Blanco began losing weight, and his senior bloodwork showed that he had developed hyperthyroid disease. A month later, he came in to our hospital to stay with us for a week while he received Radioactive Iodine treatment for his hyperthyroidism. His thyroid has been normal ever since.

In 2013, his kidney values began to creep up. So far, they continue to be only mildly elevated, but we are continuing to monitor them regularly.

Blanco's right eye is becoming cloudy and discolored

In 2014, Blanco started to suffer discomfort from old injuries to his right eye. The lens had been displaced by the trauma from a fight long ago, and when he started to form a cataract due to old age, the problem became worse. The body started treating the lens as a foreign body and he developed a condition called "uveitis".  The pressure in the eye decreased, and the eye became sensitive and  painful. On October 14, he had an enucleation surgery to remove the eye, and on November 6th, he came in for suture removal. His mom and dad were very happy and reported that he was brighter, more active and must have been in a lot of pain before his eye was removed. Now he is doing great, and as long as he is doing well, we don't plan to see him again for 6 months. At that time, he is planning on participating in the high blood pressure screening study that is going on, right now at our hospital.

If anyone wonders whether FIV positive cats can live a long and fruitful life, Blanco is happy to say that he has been FIV positive for close to 10 years, and feels great due to the loving family he has, and due to the exceptional care they give him. We appreciate that they turn to us to help give him that care, and we hope that he has many more FIV positive years ahead of him!

Blanco's right side after suture removal

Blanco's proud, scarred face

We can't wait to see how handsome he is when all his fur has grown back!

How do I know if my cat has high blood pressure?

This is Kitty - why is she falling?

Does this cat look like she has high blood pressure? It's hard to tell from the outside, so routine testing, or "screening" is usually the best way to tell.

Most of the time, when we diagnose cats with high blood pressure, their owner has no specific complaints about their cat's health or behavior. That is because most of the negative effects of high blood pressure in cats are subtle, and act internally before outward signs are seen.

One of the most common causes of sudden blindness in cats is high blood pressure. This is because the tiny blood vessels are put under a lot of strain when a cat has chronic high pressure. This can cause the vessels to rupture or break and small areas of the retina lose blood supply. Once the blood supply is gone, small lesions or detachments form, giving your cat spotty vision. If this goes on for long enough, the entire retina can detach and cause complete blindness.

Fortunately, if high blood pressure is caught early, before too much retinal damage has been done, the lesions can heal, with treatment.

This particular cat was brought in to have an exam because she was wobbly and had started falling off a chest of drawers where she liked to sleep. The only thing that was found on her exam was that she had high blood pressure and some changes to the retina:

So, that's one problem on her list - but is her high blood pressure making her fall?

Sometimes, when a cat has high blood pressure, it is due to the presence of another disease, such as kidney disease, or hyperthyroid disease. In fact, 61% percent of cats with chronic renal failure and 87% of cats with hyperthyroidism have high blood pressure, according to research (citation below).

For Kitty, we took a blood sample to test for kidney disease and hyperthyroid disease. We discovered that Kitty did have some mild changes to her kidneys, too. We started blood pressure medication for Kitty, and when she came in to have her pressure rechecked, her owner told us that she was a changed cat! She had significantly improved, and was no longer wobbly or falling off her favorite sleeping spot.

High blood pressure can cause signs that owners can note, but again, most people only recognize that there was a problem after their cat's high blood pressure is being treated. We hear comments like: "Fluffy is so much less cranky!" or "Callie's appetite is so much better!" or "Smokey seems so much less restless and has stopped crying at night!" when people come in for their blood pressure rechecks.

Other symptoms of high blood pressure (besides blindness and retinal detatchment) include:

• Seizures
• Circling/disorientation
• Dilated pupils
• Hemmorrhage (bleeding) of the eye or nose
• Blood and/or protein in the urine
• Abnormal kidneys
• Heart murmur
• Weakness
• Signs of thyroid disease

If you think your cat may have high blood pressure, or if your cat is over the age of 7 years and you would like your cat screened for high blood pressure, you may want to consider participating in a current high blood pressure study that is being run. For more information about the study, visit www.mycatcanhelp.com or read more about it on our blog at "Feline Hypertension: What you need to know!"

J Vet Intern Med. 1990 Mar-Apr;4(2):58-62. Hypertension in cats with chronic renal failure or hyperthyroidism.

Kobayashi DL¹, Peterson ME, Graves TK, Lesser M, Nichols CE.

Feline Hypertension: What you need to know

High blood pressure? In a cat? All your cat does is lie around all day, grooming himself and sleeping - he couldn't possibly have high blood pressure, right?

Wrong!
In humans, we think about high blood pressure as a problem of high-stress, high-anxiety people with high-pressure jobs. According to the American Heart Association, however, science has not definitively proven that stress causes high blood pressure, even in humans. It is more likely that people under stress will engage in unhealthy activities that ARE linked to high blood pressure - such as smoking, drinking too much alcohol, and eating an unhealthy diet or not exercising regularly.

Unlike human high blood pressure, feline hypertension is not usually a stand-alone disease. It is most often seen associated with another illness, such as kidney disease or hyperthyroidism. However, in cats that have kidney disease, it is often uncertain whether the kidney disease caused the hypertension or chronic hypertension damaged the kidneys.

Symptoms: Just as in humans, there are few, if any, outward signs of high blood pressure in cats.

The "bubbles" in this photo of the inside of a cat's eye indicate areas where the retina is detached due to chronic high blood pressure

The most common sign of high blood pressure, and the one most recognizable by owners, is sudden blindness. Blood vessels under high stress in the eye are at high risk for rupture or leakage, which damages the retina. Over time, this can lead to complete retinal detachment and complete blindness.

Some cats with high blood pressure will develop a heart murmur or a "gallop" rhythm due to damage to the heart - most commonly a thickening or overgrowth of the muscle of the left ventricle.

Sometimes people who start treating their cats for their high blood pressure notice a change in their cat's behavior (for the better!), noting that they seem less anxious, or they have stopped howling at night, or they appear more active.

It is known that in humans, high blood pressure can cause headaches. This is very difficult to diagnose in cats, however, we know that cats experience pain in a similar manner to humans, so one might wonder if cats with high blood pressure also experience headaches.  If so, diagnosing and treating high blood pressure would relieve your cat of head pain.

Other outward signs and symptoms that may appear with high blood pressure are associated with the primary disease that is linked to the hypertension: increase in water intake and urine output, dull coat, weight loss, change in appetite (either eating more or eating less), vomiting, diarrhea, constipation, and behavior or personality changes.

Inwardly, chronic high blood pressure can lead to organ damage.
65-100% of hypertensive cats have decreased kidney function
50-70% of hypertensive cats have damage to their hearts
30-40% of hypertensive cats have damage to their retinas which can ultimately lead to blindness if left untreated
15% of cats with high blood pressure have neurologic signs including head-pressing, twitching or seizures

Prevalence and Risk Factors: The cats that are at highest risk for high blood pressure are senior cats, especially those over the age of 10 or those with other health conditions. There does not seem to be a specific breed that is at high risk for high blood pressure. 

High blood pressure in older cats appears to be fairly common, especially as a secondary problem associated with other diseases. Exactly how common is still up for debate. In researching for this article, many studies disagreed about the numbers, and most of the studies were performed with 100 or fewer cats - but we do know that hypertension is a serious issue that we can easily diagnose and treat.

Somewhere between 20-65% of cats with chronic kidney disease have hypertension.
Somewhere between 9-23% of cats with hyperthyroid disease have hypertension.

Somewhere between 17-50% of cats with high blood pressure have hypertension that is not associated with another problem.

Diagnosis: High blood pressure in cats is diagnosed with a blood pressure reading, very similar to the readings taken in humans. While oscillometric (electronic, automatic) blood pressure machines exist and are quite accurate in humans and dogs, the Doppler method of blood pressure examination is generally recommended as the most accurate in cats. The oscillometric units are often unable to detect feline blood pressure (in up to 52% of cases!), take longer to get a result, were less precise and often read lower than the actual pressure.

Checking a blood pressure with the Doppler method is painless and most cats are quite calm and unconcerned by the process. After the cat has time to acclimate itself to the exam room, the technician attaches a small cuff (the same kind that is used in human neonatal medicine) to one of the cat's legs. Preferably, the cat's owner is present to calm and hold the cat for the technician, but occasionally, just like small children, a cat may behave better for a group of strangers than in front of his or her "parents", or they may feed off an owner's anxiety and become anxious, themselves.

A small amount of alcohol is applied to the cat's foot or a small amount of hair is shaved near the paw pad, and then ultrasound gel is applied to the Doppler probe and is it gently pressed against the cat's foot. The Doppler machine is turned on, and the heartbeat becomes audible  as a "whoosh whoosh" noise. Every effort is made to keep the cat calm and relaxed during this process, to avoid artificially raising the blood pressure. Several readings are taken and the average of these readings is recorded.

Doppler blood pressure machine and supplies

 

The cat either reclines on its side for a rear leg pressure check or sits/lies in a normal position for a front leg reading. In some cats, it may be appropriate to take a measurement from the tail.

The blood pressure cuff is wrapped around the leg, and some alcohol is used to wet the fur. In some cases, a small amount of fur is shaved near the cat's paw pad. Ultrasound gel is applied to the Doppler probe and then held gently against the foot. The blood pressure cuff is then inflated and several readings are taken.

Treatment:

Amlodipine is usually the medication veterinarians turn to for treatment of high blood pressure in cats. This medication relaxes the blood vessels to allow the blood to pass more easily. Most cats started on this medication are started on a low dose and then re-checked in a couple weeks to ensure that they do not need to have additional medication. This avoids adverse side effects from a sudden decrease in blood pressure such as weakness or fainting spells, but also allows for appropriate correction of blood pressure that is severely elevated within a short period of time. Other medications such as benazepril and atenolol may be preferable in some cases, depending on the cat's overall health.

Additionally, treating any primary disease such as hyperthyroidism, diabetes, kidney disease, may aid the control of high blood pressure.

Currently, Exclusively Cats Veterinary Hospital is participating in a nationwide study of an FDA-regulated investigational medication for high blood pressure associated with chronic kidney disease in cats. This clinical trial is designed to determine the effectiveness of the investigational medication in a real-world situation. We hope you will consider this opportunity to possibly help your cat and, potentially, many other cats nationwide. 

ANY CAT* over the age of 7 is currently eligible for a free exam and blood pressure screening. 

For more information, call our office at 248-666-5287 or visit www.mycatcanhelp.com.
To get involved, please call our office to schedule an appointment!


*Any cat that is not currently on blood pressure medication, and is not an F1 generation Savannah Cat or Bengal breed.


Selected Resources and References:
More information:
High Blood Pressure in Cats: Winn Feline Foundation
High Blood Pressure (Hypertension) in cats: FAB cats
Diagnosing Feline Hypertension: Pet MD
All About Hypertension: Tanya's Comprehensive Guide to Feline Chronic Kidney Disease
Hey, Doc, Why Did My Cat Go Blind? by Dr. Eliza Sundahl at Felinedocs.com

Research and Journal Articles:
Management of Hypertension in a geriatric cat: Canadian Veterinary Journal
Managing Hypertension in Cats with Hyperthyroidism: Proceeding of the SEVC

Southern European Veterinary Conference Oct. 2-4, 2009, Barcelona, Spain, Thomas K. Graves, DVM, PhD, DACVIM 

Prevalence of systolic hypertension in cats with chronic renal failure at initial evaluation. J Am Vet Med Assoc. 2002 Jun 15;220(12):1799-804. Syme et. al

Blood Pressure in Small Animals - Part 2*:Hypertension - Target organ damage,

Heart and Kidney, A.P. Carr, B. Egner

Feline Systemic Hypertension: Classification and pathogenesis, E Rosanne Jepson, BVSc (Dist) PhD MRCVS∗
Feline Systemic Hypertension: Diagnosis and Management, Rebecca L Stepien, BS DVM MS DipACVIM (Cardiology)⇓

Evaluation of Doppler Ultrasonic and Oscillometric Methods of Indirect Blood Pressure Measurement in Cats. Haberman et al. 2004.

 A comparison of CAT Doppler and oscillometric Memoprint machines for non-invasive blood pressure measurement in conscious cats. Jepson et al. 2005.
  The Prevalence of Ocular Lesions Associated with Hypertension in a Population of Geriatric Cats in Auckland, New Zealand. Carter et. al, 2013
Routine health screening: findings in apparently healthy middle-aged and old cats. Paepe et. al. 2013
Systemic Hypertension in Cats: Current Issues in Diagnosis and Therapy, AAFP 2011 Conference 9/9-9/11. Daniel F. Hogan DVM, DACVIM (Cardiology)