Fig. 4

a. Time constant of isovolumic pressure decay (Tau) in patients stratified according to diastolic function grade. Data are shown as median with error bars representing 25 % and 75 % percentile. Patients with normal diastolic function had better relaxation (lower tau) than patients with Grade 1 diastolic dysfunction, but there were no differences between normal diastolic function and grade 2 or 3 diastolic dysfunction. b. Time constant of isovolumic pressure decay (Tau) in patients stratified according to diastolic function grade and presence or absence of left ventricular systolic dysfunction (EF < 50 %). Data are shown as median with error bars representing 25 % and 75 % percentile. *: p < 0.05 for comparison between patients with EF ≥ 50 % and Grade 1 diastolic dysfunction versus all other diastolic function subgroups with EF ≥ 50 %