Clinical breed riskHigh risk
Mitral Valve Disease in Cavalier King Charles Spaniels
Myxomatous mitral valve disease
A high-urgency clinical brief for families and relocation partners who need symptoms, timelines, and digital tracking—not generic breed marketing.
Clinical overview
Why Cavalier King Charles Spaniels carry elevated Mitral Valve Disease risk
Cavaliers have extraordinary predisposition to myxomatous mitral valve disease (MMVD). A murmur in early adulthood can progress over years to congestive heart failure. Serial echo reports (ACVIM stage B1→B2→C), resting respiratory rate logs, and diuretic response curves form the clinical spine of long-term cardiology care—and of international travel clearance.
Watch list
Symptom checklist
- Soft left-apical systolic murmur first noted on wellness exam
- Coughing, especially at night or after excitement
- Reduced stamina / reluctance to walk usual distances
- Elevated resting respiratory rate at home
- Syncope or collapse in advanced congestive stages
Digital vault protocol
Emergency & longitudinal management
- Archive every echocardiogram with ACVIM stage and vertebral heart score
- Train owners to log sleeping respiratory rate; store weekly averages
- Track pimobendan / ACE-inhibitor / diuretic start dates and dose changes
- Keep thoracic radiograph reports with heart-failure episode timestamps
- Pre-flight cardiology letters should reference the latest staged echo
PetClues is not veterinary advice. Always consult a licensed veterinarian for diagnosis, treatment, and urgent medical decisions.