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- W1994345808 abstract "To establish normative data for the right atrioventricular valve area (RAVA) and left atrioventricular valve area (LAVA) between 18 and 33 + 6 weeks gestation using STIC (Spatio-Temporal Image Correlation). An observational cross-sectional study was performed involving 69 pregnant women between 18 and 33 weeks + 6 gestation. The RAVA and LAVA measures were performed using a Voluson 730 ultrasound scanner (730 Expert version, GE), equipped with a 4–8-MHz transabdominal probe. The tridimensional heart volume was acquired in the four chamber view with the apex in an anterior position. Each valve area was drawn manually in render mode and the offline analysis was performed using Voluson 4DView software. To analyze the correlation between RAVA and gestational age (GA) and LAVA and GA, regression models were constructed and adjustments were made using the determination coefficient (r2), with 95% confidence interval. There was a high correlation between measurements of the RAVA and GA (r = 0.80) and measurements of the LAVA and GA (r = 0.79). With the adjustments made, the best curve that demonstrated this correlation was an exponential curve: RAVA = exp (0.114 × GA + 0.026), r2 = 0.69. There was a high correlation between LAVA and GA too (r = 0.79). The exponential model that best described the correlation was: LAVA = exp (0.119 × GA + 0.025), r2 = 0.68. Mean RAVA increased from 0.20 cm2 at 18 weeks to 0.95 cm2 at 33 + 6 weeks. Mean LAVA increased too from 0.21 cm2 at 18 weeks to 1.24 cm2 at 33 + 6 weeks. The area measurements of fetal atrioventricular valves can be performed using STIC, and its values increase from 18th to the 33th + 6 week of gestation. The atrioventricular valves area also showed a high correlation with GA." @default.
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- W1994345808 date "2010-10-01" @default.
- W1994345808 modified "2023-10-17" @default.
- W1994345808 title "OP22.07: Nomogram of fetal atrioventricular valves area measured with STIC" @default.
- W1994345808 doi "https://doi.org/10.1002/uog.8133" @default.
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