Echocardiogram for Dogs: What It Checks, What to Expect, and When It’s Needed

An echocardiogram for a dog is an ultrasound examination of the heart — a non-invasive, real-time imaging test that lets veterinary cardiologists see the heart’s structure, valve function, and blood flow without radiation or surgery. It’s the most powerful tool in veterinary cardiac diagnosis: more accurate than X-rays or electrocardiograms (ECGs) for identifying structural heart disease, and the definitive test for several of the most common cardiac conditions in dogs. Most dogs tolerate the procedure well without sedation, and no fasting is required.

What Does a Dog Echocardiogram Check?

According to VCA Animal Hospitals², a dog echocardiogram evaluates “heart valves, blood flow, the cause of heart murmurs, and the strength and health of the heart muscle and its chambers.” More specifically, it measures:

These measurements allow a veterinary cardiologist to not just identify that a problem exists, but to grade its severity and track changes over time.

Types of Echocardiographic Imaging

A complete echocardiographic exam typically uses multiple imaging modes:

Two-dimensional (2D) echocardiography — Produces real-time cross-sectional images of the heart from multiple angles, showing overall structure and motion.

M-mode echocardiography — Generates a single-dimension time-motion graph that allows precise measurement of chamber dimensions and wall thickness at specific points in the cardiac cycle.

Doppler echocardiography — Measures blood flow velocity and direction. Color Doppler shows flow patterns visually; spectral Doppler quantifies pressures and gradients across valves and defects. Doppler is essential for grading valve disease severity and identifying abnormal communications.

Conditions an Echocardiogram Can Diagnose

According to the Cummings School of Veterinary Medicine at Tufts University¹, echocardiography is the gold standard or primary diagnostic tool for:

Dilated Cardiomyopathy (DCM) — A condition in which the heart’s chambers enlarge and contractility declines. An echocardiogram directly visualizes chamber dilation, wall thinning, and reduced fractional shortening — making it the definitive diagnostic test.

Mitral Valve Disease (MVD) — The most common heart condition in dogs, particularly small breeds. An echocardiogram reveals valve thickening, the degree of backflow (regurgitation), and left atrial enlargement — the last of which predicts risk of congestive heart failure.

Pericardial Effusion — Fluid around the heart. Tufts calls echocardiography “the best test to confirm pericardial effusion is present” and to identify whether a mass or other cause is responsible.

Congenital Heart Defects — Including patent ductus arteriosus (PDA), subaortic stenosis, pulmonic stenosis, and ventricular septal defects. An echo allows cardiologists to visualize the defect directly and measure its hemodynamic impact.

Breeds That May Benefit from Cardiac Screening

Some breeds carry significantly elevated risk for DCM and may benefit from periodic echocardiographic screening — even without any symptoms:

For these breeds, a baseline echocardiogram before symptoms develop is often recommended. Early identification allows earlier intervention and better long-term management.

What to Expect During a Dog Echocardiogram

According to Zoetis Petcare³, the procedure typically takes no longer than 15 minutes and is well-tolerated by most dogs.

Preparation: No fasting is required for most echocardiograms unless sedation is anticipated. Dogs may be asked to arrive calm — avoid high-energy activity immediately beforehand.

The procedure: Your dog lies on their side on a padded table. A small amount of fur may be parted or trimmed on the chest wall to allow probe contact. Ultrasound gel is applied, and the cardiologist or technician positions a cardiac probe against the chest to capture images from multiple angles.

Sedation: Sedation is not required for most dogs.³ An anxious or painful dog may be given a mild sedative to help them stay still. Unlike CT scans, general anesthesia is not used.

Results: A board-certified veterinary cardiologist reviews the images and provides an interpretation, often with treatment recommendations if heart disease is identified.

How Much Does a Dog Echocardiogram Cost?

Echocardiogram costs vary based on whether it’s performed at a general practice or by a board-certified cardiologist at a specialty hospital. Specialist echocardiograms cost more but provide detailed grading and interpretation. Geographic region also affects pricing.

For context on veterinary diagnostic costs more broadly, see how much does a vet checkup cost.

Does Pet Insurance Cover Dog Echocardiograms?

Pet insurance can help cover the cost of an echocardiogram when it’s part of a diagnostic workup for a covered condition. Most accident and illness plans include diagnostic imaging — including cardiac ultrasound — when medically necessary. For a full breakdown of coverage, see what does pet insurance cover.

Timing matters for cardiac conditions. If heart disease is identified before a policy is in place, it will typically be excluded as a pre-existing condition. For breeds predisposed to DCM, enrolling before any cardiac evaluation begins provides the broadest possible coverage. For more on this, see pre-existing conditions and pet insurance.

Frequently Asked Questions

What is the difference between an ECG and an echocardiogram?

An ECG measures the heart’s electrical activity — it identifies arrhythmias and conduction abnormalities. An echocardiogram uses ultrasound to image the heart physically — showing structure, valve function, and pumping efficiency. The two tests are complementary: ECG for rhythm problems, echocardiogram for structural disease. Many dogs with cardiac conditions receive both.

How often should high-risk breeds have an echocardiogram?

Frequency recommendations vary by breed and individual risk. For Doberman Pinschers, many cardiologists recommend annual or biannual screening starting around age 2–3. Other breeds at elevated risk may be screened every 1–2 years starting in middle age. Your veterinary cardiologist will recommend a screening interval based on your dog’s breed, age, and any symptoms or murmur findings from physical exams.

Can my regular vet perform an echocardiogram?

Some general practice veterinarians have ultrasound equipment and basic cardiac training, but a complete echocardiogram — including full Doppler evaluation and disease grading — is typically performed by a board-certified veterinary cardiologist (DACVIM – Cardiology). For screening purposes in low-risk dogs, a general vet’s assessment may be a useful starting point, but definitive diagnosis and disease staging are generally referred to a cardiologist.

Unexpected vet bills can happen when you least expect them, but pet insurance may help make those costs more manageable. Having coverage in place can help pet parents feel more prepared for emergency care, surgery, diagnostics, and treatment for covered conditions.

Spot Pet Insurance offers dog insurance plans starting at $15/month^ and cat insurance plans starting at $9/month^^, helping to make it easier to find coverage that fits your budget. Spot also makes filing claims simple with a digital claims process that lets pet parents submit a claim in 60 seconds or less. Get a free quote.

_{^ Advertised premium is based on an accident and illness plan with an 80% reimbursement rate, $500 annual deductible, and a $2,500 annual limit for a 2-year-old small mixed dog (11-25lbs) in 32009. Plan costs vary.}

_{^^ Advertised premium is based on an accident and illness plan with an 80% reimbursement rate, $750 annual deductible, and a $2,500 annual limit for a 2-year-old mixed cat in 33801. Plan costs vary.}