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ITBV, the CI and lactate. The table shows low initial values of the ITBVI and its progressive elevation, similar to the CI. Lactic acid mirrors the CI (lower panel). With below-normal preload, at 32 hours, the CI and lactate levels were normal. CI, cardiac index; ITBV, intrathoracic blood volume; ITBVI, intrathoracic blood volume index.
