Understanding Myxomatous Mitral Valve Disease in Dogs

If your dog has been diagnosed with a heart murmur, there’s a good chance it’s due to myxomatous mitral valve disease (MMVD)—the most common type of acquired heart disease in adult dogs. This condition is especially prevalent in small-breed dogs like Cavalier King Charles Spaniels, Dachshunds, Chihuahuas, and Toy Poodles.