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Updated: May 17, 2026

Cardiac Magnetic Resonance for the Evaluation of Suspected Cardiac Thrombus: Conventional and Emerging Techniques
Published on: June 11, 2019
MRI of cardiac iron overload
Winnie C W Chu1, Wing Y Au, Wynnie W M Lam
1Department of Imaging & Interventional Radiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR.
Insights
Transfusion-dependent thalassemia major patients face risks from iron overload, particularly heart complications. Cardiac MRI monitoring is crucial for managing iron load and improving patient outcomes.
Area of Science:
- Cardiology
- Radiology
- Hematology
Background:
- Transfusion therapy improves survival for thalassemia major (TM) patients.
- Iron overload from transfusions causes significant organ damage, with cardiac complications being a leading cause of mortality.
- Existing iron chelation therapies have toxicities and accessibility issues.
Observation:
- Myocardial iron deposition can be independent of other organ siderosis.
- The heart may be affected differently than other organs regarding iron accumulation.
- Monitoring individual organ iron concentration is vital for personalized patient care.
Findings:
- Recent advancements in MRI techniques offer precise methods for assessing cardiac iron load.
- MRI can quantify myocardial iron concentration, aiding in risk stratification.
- This review highlights the clinical significance of MRI in managing cardiac siderosis.
Implications:
- Optimizing patient care through accurate monitoring of cardiac iron levels.
- Improving survival rates by proactively managing heart complications in TM patients.
- Facilitating personalized treatment strategies based on individual iron burden assessments.
Abstract:
Transfusion therapy has greatly improved the survival of transfusion dependent thalassemia major (TM) patients; however, the resultant iron load damages tissues including the heart, liver and endocrine organs. Among these, heart complication still remains the leading cause of mortality. Myocardial iron deposition can occur independently of other solid organ involvement; conversely, the heart may be spared despite heavy siderosis in other tissues. Iron chelation treatment diminishes the risk of hemosiderosis; however, the chelation treatment has its own toxicities and might not be available to all patients due to costs. Close monitoring of individual organ iron concentration and function is thus important for optimization of individual patient care. This review outlines the importance and clinical significance of recently available MRI techniques for monitoring cardiac iron load.
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