“…However, several controversial results were obtained particularly regarding diastolic functions. [9][10][11][12][13][14] Hence, novel methods for more objective estimation of the cardiac functions such as tissue Doppler echocardiography (TDE) or Doppler-derived myocardial performance index (MPI) might be helpful in BD. Such as, MPI, which combines both systolic and diastolic function, 15 ventricular dyssynchrony, which indicates heterogeneity of contraction time between different myocardial segments, may give a better reflection of the global left ventricular (LV) function than conventional echocardiography, though, to our knowledge, these have not been investigated so far.…”