Fig. 11. Epinephrine infusion and increased pulmonary flow. This is a typical experiment with epinephrine infusion coupled to an increase in flow rate from 2 ml/min to 4 ml/min. Flow rate increase was commenced 21 min after start of perfusion (zero time). Epinephrine infusion (100 μM) was begun at 30 min. Pulmonary artery pressure is in red  and pulmonary venous pressure is in green . Vertical excursions in pulmonary artery pressure and pulmonary venous pressure resulted from the periodic double occlusions. LAPressure = left atrial pressure.