fig4
![Echocardiography: an overview - part I](https://image.oaes.cc/cc687935-2f85-4acd-a841-b9406f0a744a/4652.fig.4.jpg)
Figure 4. Echo-Doppler studies demonstrating the site of the sample volumes in the pulmonary artery (PA) (A) and the aorta (Ao) (B) in parasternal short-axis and apical five-chamber views, respectively; note that the bottom panels display pulsed Doppler recordings. Normal values are typically about 1.0 m/s. Reproduced from Ref.[19].