Relation of pulmonary arterial diastolic and mean pulmonary arterial wedgepressures in patients with and without pulmonary hypertension

In some subjects, it is impossible to obtain an accurate pulmonary arterial wedge pressure. This report examines the relation between pulmonary arteri al diastolic and mean pulmonary arterial wedge pressures. In patients witho ut substantial pulmonary hypertension, these 2 pressures are usually within 5 mm Hg of one another. In contrast, they are often disparate in those wit h pulmonary hypertension.