Estimation of cardiac left ventricular ejection fraction in transfusional cardiac iron overload by R2* magnetic resonance.

Abstract:

:Cardiac dysfunction due to transfusional iron overload is one of the most critical complications for patients with transfusion-dependent hematological disorders. Clinical parameters such as total red blood cell (RBC) transfusion units and serum ferritin level are usually considered as indicators for initiation of iron chelation therapy. We used MRI-T2*, MRI-R2* values, and left ventricular ejection fraction in 19 adult patients with blood transfusion-dependent hematological disorders without consecutive oral iron chelation therapy, and propose possible formulae of cardiac function using known parameters, such as total RBC transfusion units and serum ferritin levels. We found a positive correlation in all patients between both R2* values (reciprocal values of T2*) and serum ferritin levels (r = 0.81) and also total RBC transfusion volume (r = 0.90), but not when we analyzed subgroups of patients whose T2* values were over 30 ms (0.52). From the formulae of the R2*, we concluded that approximately 50 Japanese units or 2,900 pmol/L ferritin might be the cutoff value indicating possible future cardiac dysfunction.

journal_name

Int J Hematol

authors

Sakuta J,Ito Y,Kimura Y,Park J,Tokuuye K,Ohyashiki K

doi

10.1007/s12185-010-0719-1

subject

Has Abstract

pub_date

2010-12-01 00:00:00

pages

708-12

issue

5

eissn

0925-5710

issn

1865-3774

journal_volume

92

pub_type

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