Lassen MCH, et al. - Investigators assessed if the ratio of early mitral inflow velocity (E) to early diastolic strain rate (E/e'sr) could predict heart failure, acute myocardial infarction, and death resulting from cardiovascular disease after acute coronary syndrome (ACS) in 432 ACS cases, of whom 199 met the composite outcome (heart failure, acute myocardial infarction, and death due to cardiovascular disease) during follow up. They observed the mean value of E/e'sr in patients was 0.70 ± 0.37m. Vital prognostic information about cardiovascular morbidity and mortality in ACS patients could be provided by E/e'sr, but E/e'sr could not independently predict beyond that of echocardiographic parameters. In patients with relatively preserved systolic function vs patients with impaired systolic function, E/e'sr is a stronger prognosticator.