Early detection of cardiac involvement in thalassemia: From bench to bedside perspective

Table 5 Summary of the correlation between HRV and serum ferritin in thalassemia major

Population/size	Type of study	Findings	Correlation	Ref.
34 TM patients and 20 healthy subjects	Prospective	No correlations between HRV parameters and serum ferritin	×	Rutjanaprom et al[20]
19 TM patients and 19 healthy volunteers	Cross sectional	No correlation between HRV parameters and serum ferritin	×	Franzoni et al[75]
	21 TM patients and 15 healthy subjects	Cross sectional	No relationship of HRV parameters with serum ferritin	×	Ma et al[91]

TM: Thalassemia major; HRV: Heart rate variability.