Cardiac iron across different transfusion-dependent diseases

Area of Science:

• Cardiology
• Hematology
• Medical Imaging

Background:

• Iron overload is a serious complication in patients requiring frequent blood transfusions for conditions like beta-thalassaemia major.
• Cardiac iron accumulation is a primary cause of mortality in transfused beta-thalassaemia major patients.
• Symptoms of cardiac iron overload manifest late, making early detection and prevention crucial.

Purpose of the Study:

• To highlight the significance of cardiac iron monitoring in transfusional anaemias.
• To discuss the role of T2* MRI in early detection of myocardial iron.
• To review iron chelator efficacy and future research directions in managing cardiac iron overload.

Main Methods:

• Utilizing T2* magnetic resonance imaging (MRI) for direct cardiac iron measurement.
• Comparing T2* MRI with indirect markers like serum ferritin and liver iron concentration.
• Analyzing the impact of underlying disease, transfusion load, and chelation history on cardiac siderosis risk.

Main Results:

• T2* MRI enables earlier recognition of myocardial iron loading compared to indirect methods.
• Cardiac siderosis is prevalent across transfusional anaemias, with varying risk factors.
• Available iron chelators differ in their cardiac efficacy due to unique properties.

Conclusions:

• Early detection of cardiac iron using T2* MRI is vital for preventing cardiac toxicity.
• Tailoring iron chelation therapy to individual patient needs is essential.
• Further prospective trials are required to optimize single-agent and combination chelation strategies for cardiac iron and function.