Abstract 1836: Applicability of a Novel Right Ventricular Reconstruction Method Designed for 4D Ultrasound
Background: Accurate assessment of right ventricular (RV) volume is essential for patients with congenital or acquired heart disease. The goal of our study was to develop and test a new analysis method designed to reconstruct and measure shape and volume of the right ventricle in a broad group of patients.
Methods: 15 children with congenital heart disease (ToF, PDA, VSD, ASD) (6w-14y) and 15 adults (18 – 69 yr) with normal cardiac physiology or CAD were studied for RV size and function. All images were acquired with a real time 3D Philips 7500 system and full matrix-array 3D transducer (RT3DE) in a full volume sweep. Images were taken from apical and subcostal views depending on the individual’s best acoustic windows. Images were viewed offline with Research Arena and 4D RV analysis software (TomTec). Sagittal, 4-chamber and coronal views were used for semiautomatic contour detection with manual correction options (all 12–24 slices). End systolic and end diastolic volumes, RVEF and overall synchrony could be measured; RV contours could be reviewed separately in each slice.
Results: Regardless of RV shape or size volume assessment visualizing the tricuspid valve area, RV outflow tract and apex was feasible in all patients in both populations. RVEF was measured between 22–34%; EDV was 87.8ml ± 20ml in the adults and 55.2m l± 32ml in the children, while ESV was 62.5ml ± 26ml in the adults and 32.7ml ± 14ml in the children and was within 10% of MRI determinations in all 11 patients who also had an MRI within 2 month of the echo.
Conclusions: This new method provides accurate volumes and regional function based on an anatomical model of the RV and should be a real asset to assessment of RV function in CHD.