What are the potential implications of re-introduction of 'long-term responders to calcium channel blockers' in the classification of pulmonary hypertension, and how should clinicians approach the identification and management of these patients?

The purpose of reintroducing it into the definition is to identify that rare group of IPAH who would respond to CCBand perhaps their PH is likely driven by vasoconstriction rather than vasculature remodeling. They are likely to remain stable on CCB. Long-term responders are defined as those who, aft...