PMC5292861_01
Transesophageal echocardiography estimation of hepatic blood flow. (a) Hepatic vein diameter, (b) pulse wave Doppler of hepatic blood flow off cardiopulmonary bypass, (c) pulse wave Doppler of hepatic blood flow on cardiopulmonary bypass
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F1
Hepatic vein was visualized using TEE as previously reported and HBF was calculated using the formulae: pi (d/2)2 x VTI x HR during off pump and pi (d/2)2 x Vm x 60 during CPB (d = diameter, HR = heart rate, Vm = mean velocity, VTI = velocity time integral) [Figure 1].