Silver Book Fact
Medicare patients with sSAS have an average lifespan of 1.8 years without repair or replacement

Goel S, Bajaj N, Agaarwall B, Gupta S, et al. Prevalence and Outcomes of Unoperated Patients with Severe Symptomatic Mitral Regurgitation and Heart Failure. J Am Coll Cardiol. 2014; 63(2). http://www.onlinejacc.org/content/63/2/185