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Early impairment of myocardial function in young patients with beta-thalassemia major
Damiano Magrì1, Susanna Sciomer, Francesco Fedele
1Dipartimento di Scienze Cardiovascolari, Respiratorie e Morfologiche, Università degli Studi di Roma La Sapienza, Rome, Italy. damiano.magri@libero.it
Insights
Young patients with beta-thalassemia major (TM) show impaired heart function, detectable by advanced ultrasound (TDI/SI). Deferiprone may offer better myocardial protection than deferoxamine in TM patients.
Area of Science:
- Cardiology
- Hematology
- Medical Imaging
Background:
- Heart failure from iron overload is a primary cause of mortality in beta-thalassemia major (TM).
- Early detection of cardiac dysfunction is crucial for managing TM patients.
Purpose of the Study:
- To compare myocardial function in young, asymptomatic TM patients and healthy controls using echocardiography (TDI/SI) and cardiac MRI.
- To assess the impact of different iron chelation therapies (deferoxamine vs. deferiprone) on cardiac function in TM.
Main Methods:
- Echocardiography with tissue Doppler imaging (TDI) and strain imaging (SI) was performed on 30 TM patients and 30 controls.
- Cardiac MRI with T2* technique was used to assess myocardial iron levels.
- TM patients were subgrouped based on iron chelation therapy (deferoxamine or deferiprone).
Main Results:
- TM patients exhibited lower systolic myocardial velocities (Sm) and systolic strain (S) in the left and right ventricles compared to controls.
- Myocardial function and T2* values were better in patients treated with deferiprone versus deferoxamine.
- Advanced ultrasound parameters correlated well with MRI findings.
Conclusions:
- Even in young, asymptomatic, and well-chelated TM patients, myocardial function is impaired.
- Advanced echocardiographic techniques (TDI and SI) can effectively detect cardiac dysfunction in TM.
- Deferiprone may offer superior myocardial protection in TM patients, warranting further investigation.
Background And Objective:
One of the chief causes of death in patients with beta-thalassemia major (TM) remains heart failure due to iron overload. We investigated possible differences in myocardial function between a population of young asymptomatic patients with TM and healthy controls all of whom underwent an echocardiographic study, including tissue Doppler (TDI) and strain imaging (SI) analysis and cardiac magnetic resonance imaging (MRI).
Methods:
30 young asymptomatic patients with TM (16 taking deferoxamine and 14 taking deferiprone) and 30 healthy subjects underwent a cardiac MRI with T2* technique and an echocardiographic evaluation including systolic myocardial velocities (Sm), early (Em) and late (Am) diastolic velocities and systolic strain (S) at the level of basal segments of the lateral left ventricle (LV), interventricular septum (Septal) and lateral right ventricle (RV) wall. The differences in T2* values and echocardiographic parameters were also compared in patients with TM subgrouped according to iron chelation therapy.
Results:
The following TDI and SI measures were lower in patients than in controls: LV-Sm (P < 0.05), S-LV (P < 0.001), Septal-Sm (P < 0.05), Septal-Em (P < 0.001), S-Septal (P < 0.001), RV-Sm (P < 0.001), RV-Em (P < 0.001), RV-Em/Am (P < 0.05) and S-RV (P < 0.05). Myocardial function was better in the patients receiving deferiprone than those receiving deferoxamine. T2* values were higher in controls than in patients with TM and in those treated with deferiprone than those treated with deferoxamine. MRI data well correlated with SI parameters.
Conclusions:
Study underlines that, even in a population of young, asymptomatic and well-chelated patients with TM, there is an impairment of myocardial function and that this condition could be easily detected by more advanced ultrasound techniques such as TDI and SI. The better indices of myocardial function in patients treated with deferiprone clearly needs confirmation from larger prospective studies.
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