3.1 Clinical characteristics according to pressure-dimension
index tertiles
Clinical and laboratory characteristics of patients within the three PDI
groups were summarized in Table 1. The only remarkable difference
between groups in terms of clinical and demographic variables was that
the number of patients with an ischemic cardiomyopathy was significantly
higher in the second tertile. As expected, RVMD and PASP on
echocardiography were significantly different between groups, although
catheter-measured mean pulmonary artery pressure did not differ among
groups. Instead, right atrial pressure (RAP) and pulmonary vascular
resistance (PVR) were significantly different, with the former being
lowest and the latter being highest in the third tertile (Table 2).