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Cardiac size and function in children with sickle cell anemia
Insights
Children with sickle cell anemia show worsening heart function over time. Echocardiograms reveal progressive heart enlargement and declining function, indicating a need for monitoring cardiac health in these patients.
Area of Science:
- Pediatric Cardiology
- Hematology
- Cardiovascular Research
Background:
- Sickle cell anemia (SCA) is a genetic blood disorder.
- SCA can lead to various organ complications, including cardiac involvement.
- Understanding cardiac changes in pediatric SCA is crucial for management.
Purpose of the Study:
- To assess cardiac size and function in children with SCA using echocardiography.
- To identify progressive cardiac changes associated with SCA.
- To correlate cardiac function with disease progression and growth.
Main Methods:
- Echocardiographic study of 124 children with sickle cell anemia.
- Comparison with a control group of 78 healthy black children.
- Analysis of cardiac chamber dimensions, left ventricular mass, and systolic time intervals.
Main Results:
- Sickle cell patients demonstrated progressive chamber enlargement and increased left ventricular mass.
- Abnormalities in systolic time intervals were identified, despite normal contractility indices.
- Left ventricular systolic time interval ratio and preejection period were elevated and worsened with growth.
Conclusions:
- Children with SCA experience progressive cardiac remodeling and deterioration of left ventricular function over time.
- Echocardiography is valuable for detecting subclinical cardiac dysfunction in pediatric SCA.
- Early detection and monitoring of cardiac changes are essential for managing SCA complications.
Abstract:
Cardiac size and function were studied echocardiographically in 124 children with sickle cell anemia. A group of 78 healthy black children served as control subjects. Sickle cell patients exhibited progressive chamber enlargement and progressively increasing left ventricular mass. Although contractility indices were normal, when the opposing influences of volume overload due to anemia and ventricular dysfunction were separated, abnormalities of systolic time intervals were identified. Left ventricular systolic time interval ratio and left ventricular preejection period were higher in the sickle cell group and became increasingly abnormal with growth, suggesting that left ventricular function deteriorated with time.