Skip to Main Content

Ask About Financing

Irregular Heartbeat in Cats

Cats are very good at hiding problems, often not showing symptoms that something is wrong before it's too late.  So it can be hard to notice right away if your cat has an irregular heartbeat. Our vets in Santa Clarita offer advice on irregular heartbeats in cats, their causes, and potential treatment options.

What are irregular heart rhythms?

The heart is controlled by an electrical conduction system which controls the heart rate. This conduction system generates impulses, or waves, which flow through the muscles of the heart. A healthy heart muscle then contracts and pumps blood through the arteries and out into the body.

The normal heart rate in a cat at rest is between 160-200 beats per minute. Irregular heart rhythms affect many cats and are characterized by an abnormality in the cycling of electrical impulses that regulate the heart's beating. This causes the heart to beat either too fast or too slow or sometimes to skip beats. Some breeds, like Persians, Himalayans, and Maine Coon cats tend to be more prone to irregular heart rhythms than others.

Irregular heart rhythm, or cardiac arrhythmia, is important to take note of, but is not always a serious condition. An irregular heartbeat occurs from time to time when a cat is under stress, nervous, or scared.

What are the symptoms of irregular heartbeats?

It is important to know the symptoms of an irregular heartbeat in cats so that you know what to do and when to bring your cat in to see your primary vet right away. Common symptoms of irregular heart rhythm are:

  • Physical weakness, due to too long of a pause in between heartbeats
  • Depression
  • Fatigue
  • Loss of consciousness 
  • Difficulty breathing
  • Rapid breathing
  • Pale gums
  • Loss of appetite
  • Heart beats too slow
  • Heart beats too fast
  • Heart gallop (during a cycle of contractions, instead of the normal 2 beats, a third sound is audible)
  • Heart murmur, due to turbulent blood flow within the heart

Of course, a cat's heart may beat faster or slower if they are active or at rest. It's important to try to get a feel for their regular heart rate, so that you can more easily tell when it's changed pace, or when something might be wrong. For help gauging your cat's heart rate, contact your vet.

What causes of irregular heartbeats?

The possible causes for an irregular heartbeat can vary, but here are some of the most common reasons.

  • Hyperthyroidism (overactive thyroid)
  • Hypertension (high blood pressure)
  • An imbalance of electrolytes
  • Anemia 
  • Poor reaction to drugs
  • Birth defects
  • Low magnesium levels
  • Taurine deficiency
  • Low blood oxygen content
  • Heart cancer
  • Heart disease 
  • Pancreatitis
  • Heartworm infection
  • Fever
  • Hypothermia
  • Ingestion of toxins

What are the treatment options for irregular heartbeats?

Many medications can help control cardiac arrhythmia, some of which have side effects. In more serious cases, your primary vet may recommend specialty care and/or surgical procedures by a veterinary cardiologist. The most common procedure is the installation of a pacemaker for long-term and better control of the arrhythmia.

Most cats will be treated on an outpatient basis. Patients with an electrolyte imbalance will be hospitalized to receive intravenous fluid therapy. If an underlying cause of the arrhythmia is found, such as kidney disease or hyperthyroidism, then treating the underlying disease will resolve the irregular rhythm.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.

If you are concerned about your cat's heart health please contact our Santa Clarita vets to book an exam.

New Patients Welcome

Sweetwater Veterinary Clinic is accepting new patients! Our friendly and experienced vets are passionate about the health of Santa Clarita companion animals and horses. Get in touch today to book your four-legged friend's first appointment.

Contact Us

Book Online (661) 268-8128