Figure 1: Three-dimensional heart model shown in cross-section to highlight the position of the TEE plane in the upper esophageal aortic arch short axis view. A) Anterior view of the heart with TEE plane. B) Right lateral view of the heart and TEE plane. The blue dotted line represents the orientation of the pulsed wave cursor and the blue circle indicates the position of the sample box at the tip of the pulmonary valve leaflets. Key: AA = Aortic Arch, PA = Pulmonary artery, PV = Pulmonary valve.

Figure 2: Plused wave spectral Doppler data acquired for blood flow through the pulmonary valve. In the upper right, a two dimensional TEE image of the upper-esophageal aortic arch short axis view; the blue circle indicates the location of the sample volume at the tip of the pulmonary valve leaflets. In the lower half of the image, a spectral doppler trace shows the relationship between blood velocity and time. Notice that the waveform is above the baseline as blood flows towards the transducer. The baseline is orange. Key: S = Systolic wave.

Figure 3: Pulsed wave spectral Doppler data acquired for blood flow through the pulmonary valve. In the upper left, a two dimensional TEE image of the modified transgastric basal view. In the lower half of the image, a spectral Doppler trace shows the relationship between blood velocity and time. The baseline is orange. Key: S = Systolic wave.