Figure 2: (a-d) A modified left suprasternal 2-D transthoracic echocardiography view (a) with color Doppler (b) showing a laminar flow through the left vena cava. A mid-esophageal 4-chamber transesophageal echocardiography view showing the chambers of the heart before (c) and after (d) agitated saline injection into the left internal jugular vein