Fig. 1. The representative recordings of airway pressure, pulmonary arterial pressure, mean arterial pressure, aortic blood flow, central venous pressure, left atrial pressure, portal venous pressure, and heart rate after an intravenous injection of the antigen of ovalbumin (0.6 mg) in a sensitized control rat (A ), a propranolol-pretreated rat (B ), and an adrenalectomized rat (C ).