Pet Symptom Checker

Aortic stenosis

Medical name: Aortic stenosis

Emergency Warnings



  • Stressful breathing
  • Racing heartbeat
  • Unconsciousness


Aortic stenosis refers to a condition in which the aortic valve leading out of the heart does not open fully. Aortic stenosis in pets is most commonly characterized by a rapid heartbeat. To take your pet's pulse, with the animal sitting or lying in a relaxed position, locate the heart (on the left side of the chest near the elbow) with the palm of one hand (the other hand can restrain or reassure your pet). Count beats for 15 seconds and multiply by 4 to get beats per minute. You can also take your pet's pulse in the groin area, where you’re feeling for the femoral artery where the hind leg meets the body. For a small dog (up to 20 pounds) at rest, a normal heart rate is 70-180 beats per minute. Medium- and large-size dogs’ hearts (at rest) beat at an almost-humanlike 60-140 beats per minute. Young puppies (up to 6 weeks) race along at as much as 220 beats. Cats, too, normally have fast hearts: somewhere between 120-240 in adult cats and up to 300 beats per minute in young (up to 6 weeks) kittens. Unconsciousness or distressed breathing can also indicate an aortic stenosis. If you suspect your pet is suffering from this condition, do not delay in seeking veterinary medical attention. A narrowing or blockage in your pet's aorta can be fatal.

Zootoo does not provide veterinary medical advice, diagnosis, or treatment. Always seek the advice of a veterinarian with any questions you may have regarding your pet’s medical condition.
If you think your pet may be experiencing a medical emergency, call your veterinarian or an emergency animal care facility immediately.

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