Breed-Specific Echo Normals

Refining diagnostic accuracy through evidence-based reference intervals and advanced allometry.

Breed Database

Search published reference intervals for specific canine breeds to improve staging accuracy and reduce false positives.

Allometric Predictor

Generate applicable reference data using specialized allometric models for puppies, kittens, and toy breeds.

Select a Breed to View Normals:

Select a breed above to view published echocardiographic limits, clinical notes, and research sources.

Weight-Based Allometric Predictor

Evidence-Based

Body Weight (kg):

Select Reference Model:

Echocardiographic Metric	Predicted Mean (mm)	95% Reference Interval

EDV (Volumetric)	—	(Sighthound Array)
ESV (Volumetric)	—

Source: View PMID:

Enter the patient's weight to generate research-backed allometric reference intervals.

Why Use Breed-Specific Reference Intervals?

Standard allometric scaling (Cornell method) is reliable for many dogs, but "deviant" breeds - in particular sighthounds like Greyhounds and Whippets - often have physiological heart sizes that fall outside standard multi-breed ranges.

Using breed-specific data helps avoid mis-staging patients with preclinical heart disease (Stage B1 vs B2).

However interpret with care. All breed data is based on specific local breed populations which may not match. Also remember reference ranges are designed to indicate outliers only, not necessarily diseased individuals. Where studies report mean and standard deviation data, reference values are reported as mean +- 2 sd (95% confidence limits).

New to Allometry?

Allometric scaling uses the power-law equation (Y = a × BW^b) to predict heart size based on body weight. This accounts for the non-linear way heart structures grow as an animal increases in size.

Using these models ensures that a 2kg puppy isn't compared against the same "normal" as a 40kg adult, significantly reducing false positives in small patients and preventing missed diagnoses in giant breeds.