Administrative Data and the Philosopher's Stone: Turning Heart Failure Claims Data into Quantitative Assessment of Left Ventricular Ejection Fraction.

Background: Administrative data are widely used in observational assessment of patient-centered clinical outcomes. In studies of cardiovascular outcomes, claims data are limited by lack of quantitative information, such as left ventricular ejection fraction. We aimed to determine whether left ventricular ejection fraction can be assessed from heart failure claims.