Statistical Analysis
All statistical analyses were performed using SPSS 25 Categoric variables were summarized as frequencies and percentages and compared among groups using χ2 or Fisher’s exact test. Continuous variables were summarized as the mean ± standard deviation. Differences between groups were assessed using the Mann-Whitney test for unpaired samples and the Wilcoxon’s test for paired samples. All P values for statistical analysis were two-tailed, and a P value less than .05 was considered to indicate a statistically significant difference. COX multiple regression analysis was used to identify risk factors for RVF after LVAD implantation. Hemodynamic data obtained during a ramp test for speed optimization were included as factors for this analysis. Initially, a univariate analysis was performed; factors with a P value less than 0.10 were then considered as candidates for a multiple regression model to identify the risk factors. We used the receiver-operating characteristic (ROC) curve with the area under the curve (AUC) analysis to calculate the best cutoff point for Hemodynamic Index association with RHF. The RVF rate after discharge was estimated using COX survival analysis.