mean pulmonary artery pressure (mPAP), and pulmonary vascular resistance (PVR). Results: Of the 29 patients, 23 were male. 26 patients were supported with a HeartMate II and the other 3 with a HeartWare HVAD. Several hemodynamic variables correlated significantly between TTE and RHC measurement: RAP (r= 0.440, p= 0.0314), PASP (r= 0.583, p= 0.0028) and mPAP (r= 0.5244, p= 0.0050). PVR measures were low across the cohort, with only one patient having PVR > 4 Woods Units, while RHC and TTE derived measures trended toward significant correlation (r= 0.3911, p= 0.0795). The Wilcoxon signed rank test results showed only the median difference of RAP measurements to significantly differ (echo = 8 mmHg, RHC = 13 mmHg), p = 0.001). No other median differences between RHC and TTE measurements were significantly different. Conclusion: In patients supported with CF-LVADs, RAP, PASP, and mPAP values obtained with transthoracic echocardiography correlate well with invasive hemodynamics. Additional confirmatory studies may allow increased reliance of TTE to routinely assess hemodynamics in patients with CF-LVADs.
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