Can tiny blood vessel changes in fingernails reverse with pulmonary hypertension treatment?

Pulmonary hypertension is a serious condition where blood vessels in the lungs become narrowed, making it harder for the heart to pump blood. Researchers have noticed that some patients with this condition—especially those with a related condition called systemic sclerosis—also have visible abnormalities in the tiny blood vessels in their fingernails. This study uses a simple microscope imaging technique called nailfold capillaroscopy to take pictures of these fingernail blood vessels before and after patients start pulmonary vasodilator therapy (medications that help widen lung blood vessels) to see if the medication improves these vessel abnormalities.

Doctors know that blood vessel problems are central to pulmonary hypertension, but they don't yet understand whether treating the disease also reverses the blood vessel damage visible in the fingernails. If this medication can improve these visible changes, it might help doctors better track how well treatment is working and predict which patients will do better.