A screening echocardiogram for a cat costs USD 200-500 in the US, and that range splits into 2 tiers that are not the same test. Tier 1 is a 25 to 35 minute 2D study measured and read in-house at USD 200-300. Tier 2 adds colour and spectral Doppler plus a report from a board-certified cardiologist, at USD 320-500. In the UK the same 2 tiers sit at GBP 180-270 and GBP 288-450; in China, CNY 400-600 and CNY 640-1,000.
The gap between them is not picture quality. It is who measures, how many measurements are taken, and whether flow across the valves and the outflow tract is examined at all.
What tier 1 and tier 2 actually contain
Tier 1 covers 6 standard measurements from a right parasternal short-axis view: left atrial to aortic ratio, fractional shortening, septal thickness in diastole, left ventricular posterior wall in diastole, left ventricular internal dimension in diastole, and left atrial size. A vet with ultrasound training produces these in 25 to 35 minutes, and they answer the 2 questions screening exists to answer: is the wall thick, and is the atrium big.
Tier 2 adds Doppler, which is where a murmur gets graded by velocity rather than by sound, plus a second view set at the left apex and a written report with a staging line. That is 40 to 55 minutes of table time, and 1 to 5 days for the report when the cardiologist reads images remotely.
The 40 minutes before the probe goes on
No fasting, no shaving. The cat lies in right lateral recumbency in a 5 cm cut-out or a soft trough, and the sonographer works through 3 or 4 windows on the chest wall: right parasternal long axis, right short axis at the papillary muscle level, left apical 4-chamber, and the aortic view under the valve. Each clip needs 3 to 6 seconds of stillness, and a full set runs 12 to 20 clips. Two people make it quicker: 1 holds the probe, 1 holds the forelimbs and watches the clock. A cat that has spent 40 minutes in a carrier, or that was just examined in a room with a barking dog, reads 10 to 20 beats per minute faster than one that has had 15 minutes in a quiet room.
Which cats are worth screening
- Breeds with a known risk: Maine Coon and Ragdoll for hypertrophic cardiomyopathy, British Shorthair for cardiomyopathy and outflow obstruction, Sphynx, Persian. Start at 3 to 4 years and repeat every 12 to 18 months, because a normal study at age 2 does not clear a cat for life.
- Any cat with a murmur of grade 3 out of 6 or louder, an arrhythmia felt on examination, or a gallop sound.
- Cats over 8 years old before a dental or any anaesthetic, when a murmur or arrhythmia is heard.
- Breeding cats: 1 study before the first mating, then every 12 months.
Three regions, one table
| Line item | US (USD) | UK (GBP) | China (CNY) |
|---|---|---|---|
| 2D echo, 25-35 min, measured in-house | 200-300 | 180-270 | 400-600 |
| Doppler, colour and spectral | 40-90 | 36-81 | 80-180 |
| Cardiologist review and written report | 80-110 | 72-99 | 160-220 |
| Total, tier 1 screening | 200-300 | 180-270 | 400-600 |
| Total, tier 2 full study | 320-500 | 288-450 | 640-1,000 |
The 2 totals are alternatives, not additions: tier 1 is the first row alone, tier 2 is all 3 rows. Within each region the same study moves 1.5 to 3 times with city and hospital tier, so a tier 1 study at 200 and a tier 1 study at 300 can be the same 6 measurements on the same afternoon. Sedation, if the cat needs it, is a separate 40 to 80 USD and does not change a single measurement.
Reading the 5 numbers on the report
Left atrial to aortic ratio under 1.5 is normal, 1.5 to 1.7 is equivocal and usually means a recheck in 6 months, and above 1.7 supports atrial enlargement. Fractional shortening of 30 to 45 percent is the usual normal band; under 25 percent suggests reduced contractility. Septal and free wall thickness in diastole at 5.5 mm or less is normal for most cats, and 6 mm or more in a Maine Coon over 3 years is the threshold most cardiologists treat as hypertrophic cardiomyopathy. Left atrium under 1.6 cm along its long axis. A measurement printed without a reference range next to it is a number you cannot use.
What a screening study cannot do
It cannot rule out cardiomyopathy on 1 normal study, because a cat with a 4.5 mm wall at 2 years can measure 7 mm at 5; serial studies are the tool, not a single afternoon. It cannot measure blood pressure, which needs a cuff and 3 to 5 readings. It cannot find a clot in the aorta, which needs a different protocol and usually an emergency setting. And it does not replace radiographs when the question is fluid in the lungs: echo shows the heart, X-ray shows the lungs, and cats in heart failure often need both within 4 hours.
When it stops being screening
Open-mouth breathing, a resting rate over 40 breaths per minute, grey or blue gums, or sudden hind-limb paralysis with cold paws are emergencies, and the echo then happens in the ER at a different price: USD 350-600 in the US, GBP 315-540 in the UK, CNY 700-1,200 in China, often between 1 and 3 am. For a stable cat, book a morning slot: 40 minutes in a carrier raises the heart rate and makes fractional shortening less repeatable, which is why the 12-month comparison can drift by 5 percentage points for no clinical reason.
What the estimate should state, in 5 lines
- Who measures: a vet on site, or a cardiologist reading images later.
- Doppler included, or billed as an add-on at USD 40-90.
- Sedation: about 1 in 5 cats needs it, at USD 40-80, and it does not alter the measurements.
- Report format: a written report with reference ranges, not 3 sentences on a discharge sheet.
- Repeat interval written on the report: 6, 12 or 18 months.
For how a screening fits the yearly visit schedule, see vet visit frequency and cost; if the cat is already in hospital on fluids, transfusion and dialysis costs covers the next tier of care.
Terms mentioned in this article
Frequently asked
Is a screening echo enough, or do I need the cardiologist tier?
For a healthy cat with no murmur, tier 1 gives the 6 measurements that decide whether the wall is thick and the atrium is big, which is most of the screening question at 200 to 300 USD. Add tier 2 when a murmur is grade 3 or louder, when the tier 1 numbers sit in the 1.5 to 1.7 grey zone, or when an anaesthetic is planned and the reading will decide the protocol.
How often should a Maine Coon be scanned?
Every 12 to 18 months from age 3, because wall thickness in hypertrophic cardiomyopathy often appears between 3 and 6 years and a 4.5 mm septum at 2 years can be 7 mm at 5. Breeding cats get 1 study before the first mating and then annually, and any cat with a new murmur gets one within 4 weeks rather than at the next scheduled slot.
Does the cat need to be sedated for the echo?
About 1 in 5 does, at 40 to 80 USD. Shaving is not needed, but the cat has to lie still on its side for 25 to 55 minutes while the probe is held at 3 or 4 windows on the chest wall. Sedation with a protocol that preserves heart rate does not change the measurements, and a struggling cat produces a worse study than a calm sedated one.
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