Silver Book Fact
In 2008, any-mention mortality was 281,437 for heart failure. It was the underlying cause of death in 56,830 of those deaths.
Roger V, Go A, Lloyd-Jones D, Benjamin E, et al. Heart Disease and Stroke Statistics–2012 Update. Circ. 2012; 125(1): e2-e220. http://circ.ahajournals.org/content/125/1/e2