Dog Stage B2 Heart Disease Life Expectancy Calculator
Estimate life expectancy and time to heart failure for dogs diagnosed with Stage B2 mitral valve disease — based on EPIC trial data and ACVIM guidelines.
What Is the Dog Stage B2 Heart Disease Life Expectancy Calculator?
Estimate life expectancy and time to heart failure for dogs diagnosed with Stage B2 mitral valve disease — based on EPIC trial data and ACVIM guidelines.
Stage B2 mitral valve disease is a critical juncture — your dog has a confirmed heart murmur AND echocardiographic evidence of cardiac enlargement, but is not yet showing signs of heart failure. The landmark EPIC trial proved that starting Pimobendan at this stage delays the onset of heart failure by a median of 15 months. This calculator gives Stage B2 owners specific prognostic estimates and treatment guidance.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
Stage B2 MVD is defined by the ACVIM consensus (Keene et al. 2019) as: audible murmur, radiographic or echocardiographic evidence of left atrial enlargement (LA:Ao ratio ≥1.6) and/or left ventricular enlargement (normalised LV internal diameter in diastole >1.7). The EPIC trial showed: median time to heart failure was 15.0 months in the Pimobendan group vs 9.3 months in placebo — a 15-month delay. Dogs with more severe echocardiographic changes tend to progress faster. Cavalier King Charles Spaniels progress more rapidly than other breeds.
Sources: Boswood A et al. Effect of Pimobendan in dogs with preclinical MVD — the EPIC Study. J Vet Intern Med 2016; Keene BW et al. ACVIM consensus guidelines for MVD in dogs. J Vet Intern Med 2019; Häggström J et al. Longitudinal analysis of echocardiographic Doppler variables in CKCS. J Vet Intern Med 2008.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- Merck Veterinary Manual — Health and wellbeing reference data and clinical guidelines
- WSAVA Global Nutrition Guidelines — Body condition scoring and nutritional health standards
- American Animal Hospital Association (AAHA) — Preventive care guidelines and wellness protocols
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.