Although the survival rates were not significantly different from those supported by VADs alone, there was a trend towards improved survival with Impella, though this did not reach statistical significance.
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Efficacy of Impella Microaxial left ventricular assist device as bridge to transplant in children with end stage heart disease.
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The sentences
Notably, there was a clear trend towards increased use of the Impella device over time, as illustrated in Figure 1 .