In this review it states that how In a single-center observational study, the authors demonstrated that a significantly higher percentage of SSc patients with a persistently positive EE, as defined by an increase in right ventricular systolic pressure (RVSP) ≥ 20 mmHg with exercise, subsequently developed pulmonary hypertension (PH) compared with those who had persistently negative EE. The majority of patients with a baseline positive EE were found to have a persistently positive EE over time. However, interestingly, a proportion of those patients did not develop resting PAH. Similarly, 3 patients with baseline negative EE developed PAH shortly after initial testing, possibly representing a false-negative result. Because invasive hemodynamics with right heart catheterization (RHC) was not performed unless clinically indicated and was also performed up to 6 months following EE, it is difficult to ascertain the meaning of the present findings. Certainly, other SSc-specific features or biomarkers of increased risk in combination with positive EE need to be identified; however, lack of standardization in annual testing limits identification in this present study.
Reference link- https://www.jrheum.org/content/47/5/643