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Figure 2 Examples of the on-line measurement of oxygen consumption (VO₂) in 3 patients shows the rapid and small (A, Patient 3), moderate (B, Patient 2), and great (C, Patient 4) decreases in VO₂ after terminating dopamine at different times after the arrival in the intensive care unit (ICU). Arrows indicate the time of terminating dopamine. Short bold lines indicate the 30-min periods for averaging VO₂ measures before and 100 min after terminating dopamine.