Related Experiment Videos
Endomyocardial biopsy in hemochromatosis: clinicopathologic correlates in six cases
L J Olson1, W D Edwards, D R Holmes
1Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, Minnesota 55905.
Insights
Cardiac hemochromatosis, diagnosed via endomyocardial biopsy, shows stainable iron within heart muscle cells. This iron accumulation correlates with impaired heart function, suggesting a storage disease.
Area of Science:
- Cardiology
- Pathology
- Iron Metabolism
Background:
- Cardiac hemochromatosis is a rare condition affecting the heart.
- Diagnosis often relies on invasive procedures and detailed analysis.
Observation:
- Six men with cardiac hemochromatosis underwent endomyocardial biopsy.
- Echocardiography revealed left ventricular enlargement and systolic dysfunction in most patients.
- Cardiac catheterization showed impaired ventricular function and normal coronary arteries.
Findings:
- Stainable iron was consistently found in endomyocardial biopsy samples from patients with reduced left ventricular systolic function.
- Histological analysis confirmed iron deposition within the sarcoplasm, varying inversely with ventricular function.
- Cardiac hemochromatosis functions as a storage disease, not an infiltrative one.
Implications:
- Endomyocardial biopsy with iron staining is crucial for diagnosing cardiac hemochromatosis.
- Identifying iron deposition aids in understanding and managing idiopathic cardiac dysfunction.
- This finding supports the diagnostic utility of iron staining in specific cardiac conditions.
Abstract:
Clinical and pathologic features of cardiac hemochromatosis diagnosed by endomyocardial biopsy in six men, aged 32 to 75 years (mean 52), are described. Echocardiography demonstrated left ventricular enlargement and marked global systolic dysfunction in five. Cardiac catheterization demonstrated normal coronary arteries, increased left ventricular end-diastolic pressure and decreased left ventricular systolic function in all five so studied. Stainable iron was present in all endomyocardial biopsy specimens from the five patients with decreased left ventricular systolic function. Histologically, iron was detected only within the sarcoplasm, and its extent varied inversely with ventricular function. Thus, cardiac hemochromatosis represents a storage rather than an infiltrative disease. These results indicate that stainable iron is consistently observed in endomyocardial biopsy specimens from patients with impaired left ventricular systolic function. Iron staining is recommended for endomyocardial biopsy specimens from patients with idiopathic cardiac dysfunction.