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[Heart involvement in hypereosinophilia: the restrictive or the dilated type?]
Insights
Hypereosinophilia can cause heart damage, leading to dilated cardiomyopathy. This condition affects heart function and structure, as seen in numerous patients studied.
Area of Science:
- Cardiology
- Hematology
Background:
- Hypereosinophilia, a condition characterized by elevated eosinophil counts, can affect multiple organ systems.
- Cardiac involvement is a significant concern in hypereosinophilic syndromes, potentially leading to severe heart damage.
Observation:
- Sixty patients with hypereosinophilia were evaluated for cardiac manifestations.
- Clinical signs included congestive heart failure, tachycardia, and murmurs.
- ECG abnormalities such as repolarization disorders and His bundle block were noted.
Findings:
- Forty patients exhibited clinical and/or ECG signs of heart injury.
- Echocardiography revealed a dilated pattern of heart injury in 15 of 20 patients.
- Postmortem examinations confirmed endomyocardial fibrosis and heart dilatation in fatal cases.
- Isolated right ventricular injury and endocardial thickening were observed in some patients.
Implications:
- Hypereosinophilia is identified as a potential etiological factor for dilated cardiomyopathy.
- Understanding this link is crucial for accurate diagnosis and management of cardiac complications in hypereosinophilia.
- Further research is warranted to elucidate the precise mechanisms of cardiac injury in these patients.
Abstract:
As many as 60 patients with hypereosinophilia of different genesis were examined. 40 of them manifested the clinical (congestive heart failure in 6, tachycardia in 10, cardialgias in 3, murmur in the heart in 13, pericardial murmur in 3) and/or ECG signs (disorders of repolarization in 25, His bundle block in 4, rhythm disorders in 7, pathologic Q waves in 2) of heart injury. In 15 out of the 20 examined, the echocardiography data corresponded to the dilated pattern of heart injury despite the fact that the changes in contractile function of the left ventricle were less appreciable than in 28 patients with dilated cardiomyopathy. In 2 patients who died (one from congestive heart failure and one from anaphylactic shock) the presence of endomyocardial fibrosis with heart dilatation was confirmed on postmortem examination. One female patient with right ventricular failure manifested the characteristic signs of isolated injury to the right ventricle. In 3 patients, the endocardium appeared thickened. None of the cases showed the signs of restrictive heart injury. The data obtained indicate that hypereosinophilia may be one of the etiologic factors of dilated cardiomyopathy.