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Effects on heart rate and stroke volume. Percentage of change in heart rate (A) and stroke volume (B). Within milrinone group, end points were measured with milrinone alone (solid black lines) and in addition to a baseline of dopamine 5 μg·kg−1·min−1 (dashed black lines) and epinephrine 0.1 μg·kg−1·min−1 (dashed gray lines). **P < 0.01, ***P < 0.001, n = 10 replicates per group. Error = SE.
