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Cardiac involvement in beta-thalassemia/hemoglobin E disease: clinical and hemodynamic findings
1Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University.
Insights
Beta-thalassemia/hemoglobin E disease commonly causes right heart failure due to pulmonary hypertension. This study highlights the critical need for early detection and management of cardiac complications in these patients.
Area of Science:
- Cardiology
- Hematology
- Pulmonology
Background:
- Beta-thalassemia/hemoglobin E disease is a complex genetic blood disorder.
- Cardiac complications, particularly right heart involvement, are increasingly recognized.
- Previous research has not fully elucidated the spectrum of cardiac abnormalities in this population.
Purpose of the Study:
- To investigate the clinical and hemodynamic manifestations of cardiac involvement in patients with beta-thalassemia/hemoglobin E disease.
- To assess the prevalence and severity of right heart abnormalities and pulmonary hypertension.
- To identify potential risk factors and clinical outcomes associated with cardiac dysfunction.
Main Methods:
- Conducted clinical and hemodynamic evaluations in 8 patients (6 women, 2 men) with beta-thalassemia/hemoglobin E disease.
- Utilized electrocardiography (ECG), echocardiography, and cardiac catheterization.
- Assessed systemic blood pressure, heart rhythm, atrial size, repolarization, right heart function, pericardial effusion, and hypoxemia.
Main Results:
- All patients presented with congestive heart failure; most had undergone splenectomy.
- ECG showed normal sinus rhythm, right axis deviation, right atrial enlargement, and repolarization abnormalities.
- Echocardiography detected right heart abnormalities and pericardial effusion; cardiac catheterization revealed hypoxemia and pulmonary hypertension in most patients.
- Left ventricular dysfunction was observed in some individuals.
Conclusions:
- Right heart involvement secondary to diffuse pulmonary thromboembolic disease is a major complication of beta-thalassemia/hemoglobin E disease.
- Pulmonary hypertension and subsequent right heart failure are significant concerns.
- Early cardiac screening and management are crucial for improving outcomes in patients with this condition.
Abstract:
Clinical and hemodynamic studies were conducted in 6 women and 2 men with beta-thalassemia/hemoglobin E disease. All except one had splenectomy. The patients were hospitalized in the state of congestive heart failure. The systemic blood pressure was low or normal. The electrocardiograms revealed normal sinus rhythm in all, right axis deviation in some, right atrial enlargement in the majority and repolarization abnormalities in some. The echocardiograms were sensitive to detect the right heart abnormalities and pericardial effusion. Cardiac catheterization disclosed moderate to marked hypoxemia. All patients except one had pulmonary hypertension. Some had left ventricular dysfunction. From this study. It is concluded that right heart involvement secondary to diffuse pulmonary thromboembolic disease is a major complication of beta-thalassemia/hemoglobin E disease.