The Normal Heart

The heart is divided into 2 halves: left and right. Each half of the heart is divided into separate chambers — the upper ones, known as the atria, receive blood from the body whereas the lower ones, the ventricles, pump it out again. In between these chambers are the heart valves, which open and shut in sequence to make sure blood flows in the right direction. The valves are normally smooth and form a perfect seal when closed.

Heart Facts

Did you know…

  • A dog's heart beats between 70 and 120 times a minute, compared to a human heart, which beats 70 to 80 times a minute.1
  • On average, a dog’s heart beats 144,000 times per day.1

1. Ware WA. Cardiovascular Disease in Small Animal Medicine. London: Manson Publishing Ltd; 2011.

Facts about heart disease brochure

Learn more about canine heart disease…and help protect your dog’s heart.