Defining the groups:
According to multivariate regression analysis and a receiver operating characteristic (ROC) analysis, we found intraprocedural MG, with a cut-off value of 4.5 mmHg, was the strongest predictor of the primary endpoint (Table 5) . Consequently, we divided our patient cohort into two groups —patients with an intraprocedural MG <4.5mmHg were defined as group 1 and ≥4.5mmHg asgroup 2 .
Additionally, we divided the patients from group 2 into two further groups: group 2A represents patients with persistent MG ≥4.5 mmHg at discharge. Group 2B consists of patients with an in-hospital decrease of MG below 4.5 mmHg.