Abstract
The ability of M-mode and 2DE to measure RVV and EF was assessed in 15 children without right ventricular outflow tract obstruction (RVOTO) (Group I). M-mode measurement of end diastolic dimension (RVEDD) was performed in the usual fashion. From the apical 4 chamber 2DE view the long axis of the right ventricle (RVLA) was measured from the apex to mid tricuspid valve, and area planed (RVA). From the anterior-posterior (AP) and lateral (lat) angio-graphic (angio) views the right ventricular body (RVB) longest length was measured, area planed, and volumes calculated using a Simoson's Rule algorithm. Data were compared by linear regression analysis (r=correlation coefficient, a=slope). RVEDD by M-mode correlated poorly with angio data. The 2DE obtained RVLA length correlated well with the maximum angio obtained length from either the AP or Lat views at both end systole (ES) and end diastole (ED). 2DE RVA also correlated with the planed area obtained from either AP or Lat angio projections. To determine the relationship between RVB volume (RVBV) and total right ventricular volume (TRW), these volumes were separately assessed in 30 other children without RVOTO (Group II). A constant relationship existed between RVBV and TRVV such that RVBV/TRW=0.75. By 2DE RVBV was determined from the apical 4 chamber view by an area-length algorithm assuming an ellipsoid model. Accurate 2DE assessment of TRW and EF in Group I patients could be achieved by the equation, Volume = 1.34 X echo calculated RVBV; (EDV r=0.92, a=0.98; ESV r=0.84, a=0.95; EF r=0.80, a=1.19). Therefore, 2DE is able to accurately measure RVV and EF in patients without RVOTO.
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Hiraishi, S., Disessa, T., Nakanishi, T. et al. 152 TWO DIMENSIONAL ECHOCAEDIOGRAPHIC (2DE) ASSESSMENT OF RIGHT VENTRICULAR VOLUMES (RVV) AND EJECTION FRACTION (EF). Pediatr Res 15 (Suppl 4), 465 (1981). https://doi.org/10.1203/00006450-198104001-00161
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DOI: https://doi.org/10.1203/00006450-198104001-00161