To amend the Public Health Service Act to provide for the expansion, intensification, and coordination of the activities of the National Heart, Lung, and Blood Institute with respect to research on pulmonary hypertension.

Pulmonary Hypertension Research Act of 2003 - Amends the Public Health Service Act to require the Director of the National Heart, Lung, and Blood Institute to expand, intensify, and coordinate the activities of the Institute with respect to research on pulmonary hypertension and to coordinate the Director's activities with related activities of other national research institutes and National...