Kennel Club Advice
This is the only breed with a priority kennel club heart testing scheme.
The Kennel Club’s Assured Breeders must use the following scheme and advice. All other breeders are strongly advised to also use this scheme : The Kennel Club’s heart scheme for Cavalier King Charles Spaniels (supported by the Veterinary Cardiovascular Society)
w.thekennelclub.org.uk/health-and-dog-care/health/getting-started-with-health-testing-and-screening/heart-scheme-for-cavalier-king-charles-spaniels/
Heart Testing schemes are constantly being reviewed and updated by VCS and The Kennel Club. The information here is correct at the time of writing (June 2024). If the links do not work it is advisable to refer to the Kennel Club website to check for updated health information about your breed and then to check on your breed club website.
https://www.thekennelclub.org.uk/search/breeds-a-to-z/