Clinical Scorecard: Geometric Patterns of the Left Ventricle and Systolic Function in Nigerian Pediatric Patients with Homozygous Sickle Cell Anemia
At a Glance
Category
Detail
Condition
Homozygous Sickle Cell Anemia (SCA) in pediatric patients
Key Mechanisms
Chronic arterial hypoxaemia and recurrent red cell sickling causing microcirculatory impairment leading to tissue and organ injury including cardiovascular complications
Target Population
Nigerian children aged 3–14 years with homozygous SCA
Care Setting
Sickle Cell Clinic at Aminu Kano Teaching Hospital, Kano, Nigeria
Key Highlights
SCA children exhibit significant cardiovascular alterations including potential left ventricular systolic dysfunction and abnormal left ventricular geometry.
Left ventricular systolic dysfunction defined as ejection fraction (EF) <55% was assessed using echocardiography following American Society of Echocardiography pediatric guidelines.
The study compared 120 SCA patients with age- and sex-matched Hb AA controls, excluding those with recent crises, transfusions, or comorbidities affecting cardiac function.
Guideline-Based Recommendations
Diagnosis
Confirm haemoglobin phenotype using high-performance liquid chromatography (HPLC).
Perform echocardiography to measure left ventricular dimensions, fractional shortening, and ejection fraction according to pediatric echocardiography guidelines.
Define left ventricular systolic dysfunction as EF <55%.
Calculate left ventricular mass index (LVMI) and relative wall thickness (RWT) to classify LV geometry.
Management
Exclude patients with recent sickle cell crises, blood transfusions, or comorbidities before cardiac evaluation.
Monitor and manage cardiovascular complications in pediatric SCA patients, considering their altered LV geometry and function.
Monitoring & Follow-up
Regular echocardiographic assessment of LV systolic function and geometry in steady-state SCA patients.
Monitor haemoglobin and foetal haemoglobin levels as potential correlates of LV function.
Risks
Potential for left ventricular systolic dysfunction and abnormal LV geometric patterns contributing to morbidity in pediatric SCA.
Increased systolic blood pressure and reduced oxygen saturation observed in SCA patients may exacerbate cardiac complications.
Patient & Prescribing Data
Hydroxyurea-naïve pediatric SCA patients aged 3–14 years in steady state without recent crises or transfusions.
No direct treatment data reported; study emphasizes the importance of cardiac function assessment prior to therapeutic interventions.
Clinical Best Practices
Systematic cardiac evaluation using standardized echocardiographic protocols in pediatric SCA patients.
Exclude confounding factors such as recent transfusions, infections, or comorbidities when assessing cardiac function.
Use matched controls for comparative studies to delineate SCA-specific cardiac alterations.
Incorporate haemoglobin and foetal haemoglobin measurements in cardiovascular risk assessment.
