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.