“…Furthermore, compared to peak E, E’ is relatively preload independent as was evident in patients with DD with pseudonormalisation of E velocity in which E’ remained low during saline loading or after nitroglycerin
71
. E’ also correlates closely with τ, even in atrial fibrillation
89
, and with invasively measured LVEDP both at rest and during exercise
90
,
91
.…”