“…Establishing a Pd/Td cutoff value of 1000 mmHg/s to define systolic dysfunction with this means alone has been proposed to be reasonable 9 . The correlation between LVEF and Pd/Td was positive but weak, which is an aspect that has already been described in medical publications 9 , although when corrected LVEF is correlated with Pd/Td, Pearson's coefficient shows a slight improvement, from 0.457 to 0.547 (p = 0.6335, with no significant difference; Fig. 5).…”