Em: early diastolic velocity, Am : late diastolic
velocity, Sm: systolic velocity,
MPI: Myocardial performance index, ET: Ejection time,IVRT : Izovolumetric relaxation time,
IVA: myocardial acceleration during isovolumic contraction
Table III: The data of time intervals and IVA in thalassemia
patients without myocardial iron overload and the controls