P5: Red Blood Cell Distribution Width in Patients with Cardiogenic Shock Supported with Impella 5.5 Temporary Percutaneous Microaxial Left Ventricular Assist Device

Background: Severe cardiogenic shock with metabolic derangement can preclude candidacy to durable left ventricular assist device (LVAD) or cardiac transplant, but may be reversed with temporary mechanical circulatory support. Our primary aim was to determine if red cell distribution width- coefficient of variation (RDW-CV) differed among survivors and non-survivors during their admission with temporary circulatory support. Methods: A series of 27 consecutive patients supported with Impella 5.5 percutaneous microaxial LVAD were reviewed retrospectively. All implants were performed via a tunneled vascular graft anastomosed to the right subclavian artery to allow ambulation. RDW-CV was recorded at admission and at the end of circulatory support. The series was divided into survivors and non-survivors. Groups were compared using Student’s t-test. Results: Surviving patients had a lower percentage of males (79% vs 88%), their cardiomyopathy was more likely to be non-ischemic (58% vs 25%), and were slightly younger (62 vs 69.5 years old) than non-survivors. RDW-CV at the end of Impella support was significantly different between those that survived [median RDW-CV 16.8], and those that did not [median RDW-CV 19.98] (p=0.04). Conclusion: In patients supported with temporary circulatory support with Impella 5.5, RDW-CV is significantly lower among patients that survive to discharge when compared to non-survivors.