Left Ventricular Geometry and Systolic Function in Nigerian Children with Homozygous Sickle Cell Anemia
Overview
This study compared left ventricular (LV) systolic function and geometric patterns between Nigerian pediatric patients with homozygous sickle cell anemia (SCA) and matched controls. It found significant differences in LV geometry and systolic function parameters, with some SCA patients exhibiting LV systolic dysfunction and abnormal LV remodeling.
Background
Sickle cell anemia (SCA) is a major public health issue in sub-Saharan Africa, causing chronic hypoxemia and multiorgan damage including cardiovascular complications. The impact of SCA on left ventricular structure and function in children remains unclear, with conflicting reports on the presence of LV systolic dysfunction. Understanding LV geometric patterns and their relationship to hemoglobin levels in pediatric SCA patients is important for clinical management.
Data Highlights
Parameter
SCA Patients (n=120)
Controls (n=120)
p-value
Median Age (years)
7 (IQR 5.0–11.0)
7 (IQR 5.0–11.0)
NS
Male:Female Ratio
1.3:1
1.3:1
NS
Body Surface Area
Similar
Similar
NS
Systolic Blood Pressure
Higher
Lower
<0.05
Diastolic Blood Pressure
Similar
Similar
NS
Oxygen Saturation
Lower
Higher
<0.05
Jaundice Presence
83.3%
Not reported
<0.001
Pallor Presence
60.0%
Not reported
<0.001
Median Hemoglobin Level
Significantly Lower
Higher
<0.05
Median Foetal Hemoglobin Level
Significantly Lower
Higher
<0.05
Key Findings
Children with SCA had significantly higher systolic blood pressure and lower oxygen saturation compared to controls.
Jaundice and pallor were significantly more prevalent in the SCA group.
Median hemoglobin and foetal hemoglobin levels were significantly lower in SCA patients than in controls.
Left ventricular systolic dysfunction (EF < 55%) was assessed, with some SCA patients showing reduced ejection fraction.
LV geometric patterns in SCA patients included normal geometry, eccentric and concentric left ventricular hypertrophy, and concentric remodeling.
There was an exploration of the relationship between hemoglobin levels and LV systolic function and geometry, though detailed correlations were not provided in the excerpt.
Clinical Implications
Clinicians should be aware that pediatric patients with homozygous SCA may exhibit altered left ventricular geometry and systolic function, potentially contributing to cardiovascular morbidity. Regular cardiovascular assessment including echocardiography may be warranted to detect early LV dysfunction and guide management. Monitoring hemoglobin and foetal hemoglobin levels may provide additional insight into cardiac risk in this population.
Conclusion
This study highlights significant differences in left ventricular structure and function between Nigerian children with SCA and healthy controls, underscoring the importance of cardiovascular evaluation in pediatric SCA care.
Related Resources & Content
World Health Organization -- Sickle Cell Anaemia as a Global Public Health Problem
Rees et al. -- Reduced Left Ventricular Ejection Fraction in Children with SCA (USA)
Chung et al. -- LV Function in Jamaican Children with SCA
Bamigboye-Taiwo et al. -- LV Function in Nigerian Children with SCA
