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Cardiac iron overload in thalassemic patients: an endomyocardial biopsy study
T Lombardo1, C Tamburino, G Bartoloni
1Servizio Talassemia, Ospedale Ferrarotto USL 35, Catania, Italy.
Insights
Heart failure in thalassemia patients is often caused by iron overload (siderosis). Endomyocardial biopsy is crucial for assessing cardiac iron, as non-invasive methods are insufficient. High ferritin levels indicate a risk for severe heart siderosis.
Area of Science:
- Cardiology
- Hematology
- Pathology
Background:
- Thalassemia major and intermedia patients face high mortality due to secondary heart failure from organ siderosis.
- Predicting cardiac siderosis and understanding its histological patterns in transfusion-dependent thalassemia remains challenging.
Purpose of the Study:
- To evaluate cardiac iron overload using both non-invasive and invasive techniques.
- To correlate serum ferritin levels with myocardial iron deposition.
- To determine the utility of endomyocardial biopsy in assessing cardiac siderosis.
Main Methods:
- Investigated fifteen thalassemia patients.
- Performed endomyocardial biopsy in ten patients.
- Utilized histochemical staining to assess myocardial iron grades.
Main Results:
- Endomyocardial biopsies revealed varying grades of iron overload with histochemical positivity.
- Non-invasive techniques did not provide an accurate assessment of cardiac hemochromatosis.
- A significant correlation was found between serum ferritin levels and myocardial iron grade.
- Elevated ferritin and poor chelation therapy compliance correlated with severe heart siderosis.
Conclusions:
- Endomyocardial biopsy is an effective tool for evaluating myocardial iron in thalassemia patients.
- Serum ferritin levels and treatment adherence are critical indicators for predicting severe cardiac siderosis.
- Non-invasive methods require further development for accurate cardiac iron assessment.
Abstract:
Secondary heart failure induced by organ siderosis is the main cause of death in patients affected by thalassemia major. At present it cannot be predicted whether heart siderosis is correlated with iron overload and little is known about the real cardiac histological pattern of post transfusional hemochromatosis in patients with thalassemia major and intermedia. The study aim was to evaluate cardiac iron overload by non invasive and invasive techniques. Fifteen thalassemic patients were investigated and endomyocardial biopsy performed in ten revealed different grades of endomyocardial iron overload with histochemical positivity. Non invasive techniques are not able to furnish an exact picture of the cardiac hemochromatosis. There was a significant correlation between serum ferritin and myocardial iron grade. Patients with elevated ferritin levels and poor compliance to chelating therapy are at high risk of severe heart hemochromatosis. It was seen that endomyocardial biopsy is a useful tool in studying myocardial iron.