You know how big a dog’s heart is if you have ever owned one. Despite how big your dog’s heart might seem, its anatomy may show that it is not very large, at least not in the physical sense. You may have noticed the size of a Chihuahua’s head and eyes in relation to its body. But have you ever thought about “How big is a Chihuahua’s heart?” The size of a Chihuahua’s heart depends on how big each dog is. The size of the Chihuahua’s heart is usually between a grape and a walnut.  Chihuahua hearts can vary in size depending upon the type of Chihuahua (teacup applehead, deer head, etc.). There is a way you can measure the size of your dog’s heart.



How Big Is a Chihuahua’s Heart?

Chihuahuas have surprisingly large hearts for their small size. Moreover, their hearts are roughly the size of an adult’s thumb. They have two smaller chambers on the left side and one larger chamber on the right. The heart pumps blood throughout the body to keep it functioning correctly.

Chihuahuas’ hearts work hard to support their small bodies, pumping more than 100 beats per minute at rest. While running or playing, they may reach up to 160 beats per minute. That’s nearly twice as fast as an adult human heart! Because of this, owners must make sure not to overexert their Chihuahua by giving them too much exercise or allowing them to become overweight. Keeping them at a healthy weight can help protect their hearts from strain and potential health problems later in life.

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What is the heart problem of Chihuahua?

Chihuahuas can suffer from various types of heart disease, including:

  • Congenital heart defects
  • Dilated cardiomyopathy
  • Bacterial endocarditis.

Congenital heart defects are generally present at birth and can cause an irregular heartbeat and fluid accumulation in the chest. Dilated cardiomyopathy is a heart muscle weakening that leads to an enlarged heart. Bacterial endocarditis occurs when bacteria enter the bloodstream and lodge on the heart valves. All three conditions can be life-threatening if left untreated. If your Chihuahua displays any signs of illness or fatigue, take it to the vet for an examination as soon as possible to ensure its health and well-being. With proper care and regular visits to the vet, your Chihuahua can live a long and happy life.

If your Chihuahua is diagnosed with a heart condition, it’s essential to provide proper care and treatment. Many heart conditions can be managed with medication, diet changes, and regular checkups at the vet. Surgery may also be an option depending on the severity of the condition. It is also essential to ensure that your pet gets adequate exercise, but not too much, as this could put extra strain on its heart. Following your vet’s instructions carefully can help keep your Chihuahua healthy for years.



Chihuahua Heart Health 

Your Chihuahua’s heart health is just as important as ours! You can take several steps to ensure your dog’s heart is strong.


  • Good nutrition and exercise are good for your heart and keep you in good spirits.
  • A healthy weight.
  • Remove harmful bacteria from your dog’s mouth and brush his teeth regularly to prevent tartar buildup. There have been studies linking tooth problems with heart disease.
  • Veterinarians can perform heart checks.
  • Blood pressure checkups
  • Do not smoke or vape around your dog (just like humans, dogs can also be affected by secondhand cigarettes).

Your Chihuahua’s heart health is often dependent on its diet. Even if your Chihuahua has no issues with their heart, it is vital to ensure that they are eating healthy foods so that problems do not occur.

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Certain meats, such as chicken, lamb, and beef, are great for Chihuahua’s heart health. It’s a great idea to give your Chihuahua puppy vitamin C and E, as well as nutrients such as omega-3 oils. These all are great for their hearts.


What are Chihuahua heart problems?

Chihuahuas are prone to several heart problems, including mitral valve disease (MVD) and patent ductus arteriosus (PDA). MVD is the most common type of heart disease in Chihuahuas and can cause symptoms such as coughing and shortness of breath. PDA is also typical in Chihuahua puppies, and can cause an abnormal heartbeat, reduced blood flow to the lungs and other organs, and sudden death. It’s important to take your Chihuahua for regular checkups with their veterinarian so early detection of any potential cardiac issues can be addressed.

How to keep a Chihuahua’s heart healthy

There are no different principles for keeping a Chihuahua heart healthy than those for humans. Regular exercise and a healthy diet keep this incredible organ in top condition.

Many people need to realize that dental health is a crucial part of our lives. Tooth tartar can build up and cause a lot of bacteria. The bacteria can be ingested and cause damage to the heart and other vital organs.

You can do a cardiac health checkup in many different ways. A thorough exam is the easiest. A veterinarian can listen to a dog’s heartbeat and detect any abnormalities that could indicate a problem.

Another common way to detect heart disease is with radiographs (or x-rays). Veterinarians can also use echocardiograms, blood pressure monitoring, and blood tests.


I’m a long-time animal lover and owner of two dogs and three cats. I grew up on a farm where we had all sorts of animals, from cows and horses to pigs and chickens. My love for animals led me to pursue a career in writing about them. I have been a pet care writer for over 5 years and have extensive knowledge of animal care, health, and behavior.

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