Radionuclide measurement of left ventricular ejection fraction in infants and children

Area of Science:

• Pediatric Cardiology
• Medical Imaging
• Biomedical Engineering

Background:

• Congenital heart disease (CHD) significantly impacts cardiac function in infants and children.
• Accurate measurement of left ventricular ejection fraction (LVEF) is crucial for managing pediatric CHD.
• Non-invasive imaging techniques are preferred for pediatric cardiac assessment.

Purpose of the Study:

• To evaluate the accuracy of equilibrium gated radionuclide angiography (EGRNA) in measuring LVEF in pediatric patients with CHD.
• To compare EGRNA measurements with biplane left ventricular cineangiography (LVCA).
• To assess the reliability of EGRNA across different age groups and shunt types in pediatric CHD.

Main Methods:

• Sixty infants and children with CHD underwent LVEF measurement using both EGRNA and biplane LVCA.
• Patients' median age was 2.25 years, with 17 under 1 year old.
• Subgroup analysis included age (<1 year) and shunt type (left-to-right, right-to-left).

Main Results:

• A good correlation coefficient was observed between EGRNA and LVCA for LVEF measurements.
• The correlation remained strong in younger children (<1 year) and those with large left-to-right shunts.
• A weaker correlation was noted in infants with right-to-left shunts.

Conclusions:

• Equilibrium gated radionuclide angiography is a valid and clinically useful tool for assessing left ventricular function in pediatric patients with congenital heart disease.
• EGRNA provides reliable LVEF data, particularly in younger children and those with left-to-right shunts.
• Further investigation may be warranted for EGRNA's utility in infants with right-to-left shunts.