Atrioventricular valve anular diameter: two-dimensional echocardiographic-autopsy correlation.

Area of Science:

• Pediatric Cardiology
• Diagnostic Imaging
• Anatomical Measurement

Background:

• Accurate measurement of cardiac anular diameters is crucial for pediatric cardiovascular assessment.
• 2-dimensional echocardiography (2-D echo) is a widely used non-invasive imaging modality.

Purpose of the Study:

• To evaluate the accuracy of 2-D echo in estimating mitral and tricuspid anular diameters in pediatric patients.
• To compare 2-D echo measurements with post-mortem autopsy data.

Main Methods:

• 2-D echo measurements of mitral and tricuspid anuli were obtained in 21 children within 30 days of death.
• Anular diameters were measured using specific echocardiographic views (parasternal long axis, apical/subcostal 4-chamber).
• Autopsy measurements were performed on cardiac specimens using calipers for comparison.

Main Results:

• A strong correlation (r=0.79) was observed between 2-D echo and autopsy measurements for anular diameters.
• Individual correlations were: mitral long axis (r=0.76), mitral 4-chamber (r=0.85), and tricuspid 4-chamber (r=0.76).
• Echo measurements were, on average, 17% higher than autopsy measurements, potentially due to specimen shrinkage.

Conclusions:

• 2-D echo offers a reasonable and accurate estimation of mitral and tricuspid anular diameters in children.
• The findings support the clinical utility of 2-D echo for assessing anular dimensions in pediatric cardiology.
• Potential overestimation in echo measurements should be considered in light of tissue fixation artifacts.