ESC/ERS guidelines: definition of inadequate response to pulmonary arterial hypertension treatments
| Inadequate clinical response for patients who were initially in WHO FC II or III: |
| 1) Resulting clinical status defined as stable and not satisfactory |
| 2) Resulting clinical status defined as unstable and deteriorating |
| Inadequate clinical response for patients who were initially in WHO FC IV: |
| 1) No rapid improvement to WHO FC III or better |
| 2) Resulting clinical status defined as stable and not satisfactory |
WHO FC: World Health Organization functional class. Reproduced from 1 with permission from the publisher.