Heart Health and the Shih Tzu

Quick answer

Shih Tzus are a breed that can be prone to specific heart valve concerns. While not every dog will develop these issues, being aware of the signs allows you to act quickly if something changes. By performing regular home health checks and keeping a detailed record of your dog's daily habits, you can provide your veterinarian with the information needed to detect problems early.

Mitral Valve Dysplasia

Mitral valve dysplasia is a condition where the heart valve does not form correctly. This is a recognised tendency rather than a proven one in the Shih Tzu. Because the valve is malformed, it may not close properly, which can force the heart to work harder to circulate blood throughout the body.

At home, you might notice your dog tiring more easily during play or showing less interest in their usual walks. You may also observe a persistent cough, especially after activity or when your dog is resting. Your veterinarian will use a stethoscope to listen for a heart murmur, which is often the first sign of this condition. If a murmur is detected, they will likely recommend an echocardiogram, which is an ultrasound of the heart, to visualize the valve structure and determine the severity of the issue.

Myxomatous Mitral Valve Disease

Myxomatous mitral valve disease involves the degeneration of the heart valve over time. This is a recognised tendency in the breed, and it is a condition frequently seen in smaller dog breeds. As the valve tissue changes, it can become thickened or leaky, preventing the heart from pumping blood as efficiently as it should.

Owners often notice this condition when their dog starts to struggle with breathing or seems restless at night. You might see your dog panting even when they are not hot or active. The vet will perform a physical exam to check for a heart murmur and assess the rhythm of the heartbeat. If they suspect this disease, they may perform chest X-rays to look at the size and shape of the heart and lungs, or use an echocardiogram to observe the valve in motion. Early detection is important, as it allows your vet to manage the condition before it progresses to heart failure.