Critical care management of pulmonary hypertension

Patients with pulmonary hypertension (PH) can be extremely challenging to manage in the critical care setting. In this article we review the classification, diagnosis, and chronic management of PH. An approach to the management of the critically unwell PH patient is discussed. Initial management involves treating underlying precipitants of deterioration and optimizing right ventricular (RV) preload. Reduction of RV afterload with pulmonary vasodilators is also required. Augmentation of cardiac function and perfusion pressures with inotropes and vasopressors may additionally be needed. Advanced renal and respiratory support may be appropriate depending on the clinical context. Patients with known PH who have undergone major surgery or who are in the immediate postpartum period are also at significant risk of deterioration and require management in the critical care setting. Although pulmonary vasodilators are associated with improvements in pulmonary haemodynamics and oxygenation in patients with acute respiratory distress syndrome or after cardiac surgery, there is currently no evidence demonstrating improved outcomes.