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Figure 11: The esophageal aortic Doppler probe into the esophagus manipulated to achieve the optimal velocity-time curve. The velocity time integral is calculated from the area under the curve. The cardiac output is calculated from the product of the velocity time integral, heart rate, and cross-sectional area of the aorta

Figure 11: The esophageal aortic Doppler probe into the esophagus manipulated to achieve the optimal velocity-time curve. The velocity time integral is calculated from the area under the curve. The cardiac output is calculated from the product of the velocity time integral, heart rate, and cross-sectional area of the aorta