How Big Is a Chihuahua Heart?

Do you have a Chihuahua? How big is their heart? How much do they love you?

These are all questions that we will answer in this blog post. We will take a look at the size of a Chihuahua’s heart, and how it compares to other breeds of dogs.

So, without further ado, let’s get started!

How Big Is a Chihuahua Heart?

There’s no denying that Chihuahuas are one of the most popular dog breeds in the world. And part of what makes them so special is their tiny size. But just how small are they? How big is a Chihuahua heart, for example?

As it turns out, a Chihuahua’s heart could be the same size as a grape or a walnut, depending on how big your Chihuahua is. Even though your Chihuahua’s heart seems really small, it is more than capable of pumping blood throughout its tiny body.

Are Chihuahuas Prone to Heart Problems?

Unfortunately, yes. Chihuahuas are more prone to heart problems than any other breed of dog.

Below are examples of the most common heart problems that affect Chihuahuas:

Patent Ductus Arteriosus (PDA)

PDA is a heart defect that is present at birth. It occurs when the ductus arteriosus, a blood vessel that normally closes after birth, does not close.

This causes blood to flow from the aorta (the large artery that carries blood from the heart to the body) into the pulmonary artery (the blood vessel that carries blood from the heart to the lungs).

PDA is a serious condition that can cause heart failure and death. Signs that your Chihuahua may have PDA include:

  • Rapid breathing
  • Exercise intolerance
  • Lethargy
  • Collapse

Regular checkups with your veterinarian, including chest x-rays, are important to detect PDA early. Treatment for PDA typically involves surgery to close the ductus arteriosus.

Pulmonic Stenosis

Another heart problem that Chihuahuas are prone to be pulmonic stenosis. This is a congenital condition that affects the heart’s ability to pump blood properly.

The Pulmonic valve is narrowed, which puts extra strain on the right side of the heart. This can cause symptoms such as fainting, fatigue, and exercise intolerance.

Treatment options for this condition include medication and surgery. Prognosis for dogs with pulmonic stenosis is generally good, especially if the condition is caught early and treated appropriately.

Aortic Stenosis

One of the most common congenital heart defects seen in Chihuahuas is aortic stenosis. This condition occurs when the aorta, which is the large blood vessel that carries oxygen-rich blood from the heart to the rest of the body, is narrowed.

This narrowing can cause problems with blood flow and may eventually lead to heart failure. Aortic stenosis is usually diagnosed by listening to the heart with a stethoscope, but it can also be detected through x-rays or echocardiography (a type of ultrasound).

Treatment for aortic stenosis often involves surgery to correct the defect. In some cases, medication may be prescribed to help manage the condition.

All of these conditions are congenital, meaning they are present at birth. They can be mild or severe, and often go undetected until the dog shows signs of heart failure.

The good news is that all of these conditions are treatable, and many dogs with congenital heart defects live long, happy lives.

If you think your dog may have a heart problem, talk to your veterinarian about ways to keep your furry friend healthy and happy.

how big is a chihuahua heart - dog sitting at a heart shape pillow

How Can I Prevent Heart Problems in My Chihuahua?

The best way to prevent heart problems in your Chihuahua is to take them to the vet for regular checkups. Keep an eye out for signs of respiratory distress, such as panting or difficulty breathing, and make sure they get plenty of exercises.

A healthy diet is also important for keeping their hearts healthy. Avoid giving them table scraps or fatty foods, and make sure they have plenty of fresh water to drink.

If you think your Chihuahua may be having heart problems, take them to the vet immediately. Early diagnosis and treatment is essential for giving them the best chance at a long and healthy life.

Below are some other tips for keeping your Chihuahua’s heart healthy:

1. Keep them at a healthy weight.

Obesity can put a strain on their heart and lead to health problems. Therefore, it is important to make sure they are getting the right amount of food and exercise.

2. Avoid letting them get too cold.

Another thing to keep in mind when it comes to Chihuahuas and their health is that they are prone to getting cold easily. This means that you should avoid letting them get too cold and if they are outside, make sure they have a warm coat or sweater on.

Also, be careful not to overheat them as this can also be dangerous. When it’s warm outside, make sure they have access to shade and water so they can stay cool.

Chihuahuas that are exposed to extreme cold and heat are at risk for heart problems since their little hearts have to work harder in these conditions.

So, if you want to keep your Chihuahua’s heart healthy, make sure they stay warm in the winter and cool in the summer.

3. Regular Exercise Is a Must

Chihuahuas are prone to obesity and joint problems, so it’s important they get plenty of exercises. How much exercise a Chihuahua needs depends on their age and health condition, but most need at least 30 minutes of moderate activity every day.

This could be a brisk walk around the block or playing fetch in the backyard. You can also try dog sports like agility or flyball to give your Chihuahua a mental and physical workout.

If you’re not sure how much exercise your Chihuahua needs, talk to your vet. They can help you create an appropriate exercise plan for your dog.

Remember, even small dogs need plenty of exercises to stay healthy and happy. So get out there and enjoy some quality time with your furry friend!

how big is a chihuahua heart - dogs face


Are Chihuahuas prone to enlarged hearts?

Yes, Chihuahuas are prone to an enlarged heart condition called patent ductus arteriosus (PDA). This is a congenital defect in which the fetal connection between the pulmonary artery and the aorta fails to close after birth.

PDA can cause symptoms such as lethargy, exercise intolerance, shortness of breath, and coughing. Therefore, it is important to have your Chihuahua checked by a veterinarian if you notice any of these signs.

Where is a Chihuahua’s heart?

A Chihuahua’s heart is located in the chest, just behind the sternum (breastbone). The heart is a muscle that pumps blood throughout the body.

Final Thoughts

So, how big is a Chihuahua’s heart? A Chihuahua’s heart is usually the same size as either a walnut or a grape.

The exact size will depend on the individual dog’s weight and body size. However, all Chihuahuas have hearts that are considerably smaller than the average human heart.

While their small hearts might make them seem fragile, Chihuahuas are actually surprisingly tough little dogs. They may be prone to some health problems, but with proper care and treatment, most Chihuahuas live long and happy lives.

Rate this post

Was this article helpful?

👍 👎

How can we improve it?


We appreciate your helpul feedback!

Your answer will be used to improve our content. The more feedback you give us, the better our pages can be.

Follow us on social media:

Facebook Pinterest


by Nicole Barnett

Nicole has been a freelance writer for over 10 years. She has three dogs, two of which she rescued from the streets. When not furiously typing away at her computer, you’d either find her chasing after her adorable dogs and kids, or volunteering at a local shelter.

Leave a Reply

Your email address will not be published. Required fields are marked *

Subscribe to our Newsletter
    Rate this post


    How can we improve it?


    We appreciate your helpul feedback!

    Your answer will be used to improve our content. The more feedback you give us, the better our pages can be.

    Follow us on social media: