Fig. 7. Cardiac index values obtained by indicator dilution during control conditions or intravenous administration of nitroprusside (NP, n = 6), nitroglycerine (NTG, n = 6), dobutamine (DOB, n = 3), or esmolol (50 μg · kg−1· min−1, ES 50, n = 3; 75 μg · kg−1· min−1, ES 75, n = 6). Other infusion rates are given in the text. For ES 75 only, the animals were also instrumented for the microsphere method.
