Demographic, clinical, biochemical characteristics, echocardiographic measurement, cardiac magnetic resonance (CMR) T2*, time-domain and frequency-domain HRV parameters of non-transfusion dependent thalassemia (NTDT) patients (n = 99).

NTBI, non-transferrin-bound iron; LPI, labile plasma iron; SDNN, standard deviation of all normal sinus R-R intervals in the entire 24-h recording; SDANN, standard deviation of all averaged normal sinus R-R intervals for all 5-min segment in the 24-h recordings; ASDNN, average of the standard deviations of all R-R intervals for all 5-min segments in the 24-h recordings; rMSSD, root mean square of the mean of the squared difference of two consecutive R-R intervals; LF, low frequency power; HF, high frequency power; LF/HF ratio, ratio of power in low/high frequency.Demographic, clinical, biochemical characteristics, echocardiographic measurement, cardiac magnetic resonance (CMR) T2*, time-domain and frequency-domain HRV parameters of non-transfusion dependent thalassemia (NTDT) patients (n = 99).