Contrast Microsphere Destruction by a Continuous Flow Ventricular Assist Device: An In Vitro Evaluation Using a Mock Circulation Loop

Table 2

Prepump and postpump mean contrast signal intensity (dB) ± 1 SD with mean difference (run 2).

	Prepump SI (dB)	Postpump SI (dB)	Mean difference
2400 RPM	14.6 ± 0.7	9.7 ± 0.9	4.8 ± 1.6	< 0.0001
2800 RPM	15.3 ± 0.7	11.1 ± 0.7	4.2 ± 1.1	< 0.0001
3200 RPM	15 ± 0.7	12.2 ± 0.9	2.8 ± 1.2	< 0.0001
3600 RPM	15.3 ± 0.6	13 ± 1.1	2.3 ± 1.3	< 0.0001