강아지 심장 초음파(에코) 검사 자주 묻는 질문 Q&A — 보호자가 꼭 알아야 할 핵심

Should Your Dog Have a Cardiac Ultrasound (Echocardiogram)? — Procedure and Result Interpretation

HeartQ&AMeongsiljang Veterinary Advisory Board

Echocardiography is a key diagnostic tool that precisely evaluates your dog’s heart structure and function. Here’s a Q&A summary of the essential information every pet owner should know.

What Is a Canine Cardiac Ultrasound (Echocardiogram)?

The structure of a dog's heart and how ultrasound waves pass through it

A canine cardiac ultrasound (echocardiogram) is a non-invasive diagnostic method that allows for detailed, real-time visualization of the heart’s structure and function. - Structural Assessment: Precisely evaluates the thickness of the heart walls (septum and free wall), the size of the ventricles and atria, and the condition of the heart valves. - Functional Analysis: Assesses how effectively the heart pumps blood by evaluating contractile function and cardiac output. - Early Detection: Identifies changes in cardiac function even during the latent stage, before obvious clinical signs appear. - Non-Invasive Safety: The painless ultrasound procedure is relatively safe, even for critically ill patients. - Regular Screening Recommended: Routine examinations are advised for senior dogs and breeds at risk for heart disease to facilitate early screening and ongoing monitoring.

Why Is a Cardiac Ultrasound Necessary?

Heart disease often shows few outward symptoms in its early stages, and acquired heart conditions typically develop in middle age or later, which frequently leads to delayed diagnosis. - Importance of early detection: Echocardiography can identify subtle cardiac changes even during the latent phase. - At-risk groups: Certain breeds are at higher risk—for example, myxomatous mitral valve disease is common in small-breed dogs, while dilated cardiomyopathy is often seen in Doberman Pinschers—so regular screening is recommended. - Determining treatment timing: Test results help determine when to initiate treatments, such as starting medication. - Slowing disease progression: Early detection and consistent follow-up allow for ongoing monitoring and management to slow the progression of the disease. - Foundation for health management: Test results guide adjustments in lifestyle and medication strategies.

A veterinarian places an ultrasound probe on a puppy's chest to examine the heart images.

What Are the Pre-Exam Preparations?

Echocardiography is a non-invasive test, so fasting is usually not required. However, if sedation is needed, your veterinarian will advise whether fasting is necessary. - Hair trimming may be required: To apply ultrasound gel and ensure proper contact of the transducer with the skin, some hair in the examination area may need to be clipped or wiped away. - Light grooming helps: Trimming the hair on the chest beforehand can make the procedure much smoother. - Consult your veterinarian: Whether sedation or correction is needed, and what pre-examination preparations are required, should be determined in consultation with your veterinarian. - Examination duration: The test is relatively simple and quick, typically taking about 20–30 minutes.

A veterinarian applying ultrasound gel to a puppy's chest.

Is the Exam Painful?

The procedure is completely painless. The ultrasound probe only makes light contact with the skin, so most dogs feel no discomfort at all. - Ultrasound Procedure: During the exam, the probe is gently moved to capture images of the heart from various angles. - Skin Contact Sensation: The area where the probe touches may feel slightly cool, but there is no sustained pressure. - Typical Reactions: Some dogs may feel brief discomfort when their fur is parted, but most remain calm and cooperative throughout the exam. - Need for Sedation: Because the exam itself is low-stress and painless, sedation is not required. - Guidance for Owners: During the procedure, it helps to gently hold your dog’s paw or speak to them in a soft, reassuring voice.

A puppy undergoing an ultrasound examination with the help of a veterinarian.

Comparison of Echocardiogram Types

Item	Main Purpose	Time Required	Required Equipment
Standard Ultrasound (2D/M-mode)	Check cardiac structure, size, and wall thickness	20–30 minutes	Basic ultrasound equipment
Color/Spectral Doppler	Analyze blood flow direction/velocity and valve function	30–40 minutes	Doppler-capable ultrasound equipment
Cardiac Catheterization/Angiography	Detailed evaluation of complex conditions difficult to confirm by ultrasound	45–60 minutes	Specialized equipment and skilled specialists

Cardiac catheterization and angiography are performed as adjuncts in cases such as complex congenital heart disease where specific lesions cannot be confirmed by ultrasound, and are usually not performed at general clinics.

How to Interpret the Results

Test results are presented as various measurements, including heart wall thickness, ventricular size, and ejection fraction. - Comparison with normal ranges: Your veterinarian will assess your pet’s cardiac function by comparing these values to established normal ranges. - Suspected heart disease: If the values fall outside the normal range, there is a higher likelihood of heart disease. - Additional testing may be required: In some cases, further diagnostics such as an electrocardiogram (ECG) or blood tests may be necessary. - Determining the treatment plan: Based on the results, we will establish a treatment approach, which may include medication or lifestyle adjustments. - Regular monitoring: Routine check-ups are recommended to track any changes over time.

A veterinarian analyzing the results of a cardiac ultrasound.

Signs Requiring Immediate Veterinary Visit

If an echocardiogram reveals reduced heart function, immediate treatment is necessary. Difficulty breathing, coughing, signs of shock, and sudden collapse are all emergency situations.

Post-Exam Care Points

After the examination, your pet may need to take medication or adjust their daily routine as directed by the veterinarian. - Medication: If reduced heart function is confirmed, your pet will need to take prescribed heart medications. Since these drugs can have side effects, regular check-ups are essential to monitor their effects. - Dietary Management: Whether dietary adjustments are necessary depends on your pet’s condition, so please consult with your veterinarian to determine the best approach. - Exercise Management: Your pet may develop exercise intolerance, so avoid strenuous activity and stick to the level of exercise recommended by your veterinarian. - Regular Check-ups: Follow-up exams should be conducted at intervals recommended by your veterinarian to monitor changes in heart condition. - Owner Monitoring: If you notice symptoms such as difficulty breathing, coughing, fainting, or sudden collapse, seek veterinary care immediately.

A puppy receiving heart health care under the guidance of a veterinarian.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Do I need to repeat the echocardiogram?

If heart disease is suspected or has already been diagnosed, regular follow-up tests are necessary to monitor the progression of the condition, as determined by your veterinarian.

What happens if my dog moves during the examination?

If your dog moves, the image may become blurry. Most dogs tolerate the procedure quietly, but if needed, adjustments can be made or a mild sedative can be used.

Can senior dogs also undergo the examination?

Yes, the risk of acquired heart disease increases with age, making regular check-ups very important. The tests are non-invasive and relatively safe, even for critically ill patients.

How much does the test cost?

The cost of the test varies depending on the clinic and location. Typically, it ranges from $70 to $100. Please contact the clinic directly to confirm whether insurance coverage applies.

Is fasting required before an echocardiogram?

Echocardiography is a non-invasive test, so fasting is usually not required. However, if sedation is needed, your veterinarian will advise whether fasting is necessary.

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References

[1] Textbook of Cardiovascular Medicine in Dogs and Cats, 2020

[2] Small Animal Critical Care Medicine, 3rd Ed, 2021

[3] Feline Emergency and Critical Care Medicine, 2nd Ed, 2019