An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Examples of vascular reconstruction for 2 control subjects (top) and 2 patients with chronic thromboembolic pulmonary hypertension (bottom). Some patients exhibited patchy disease (bottom left), whereas others exhibited diffuse disease throughout the vascular tree (bottom right).