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Changes of RRI by Impella output. Increasing the Impella® support by a mean of 0.5 L/min and 1.0 L/min resulted in a significant reduction of the RRI from baseline 0.736 ± 0.07 to 0.67 ± 0.07 and to 0.62 ± 0.077, respectively. (IO: Impella® output; BL: baseline; ns: not significant, p ≥ 0.5; ***: p < 0.001).
