Some patients with pulmonary arterial hypertension experience difficulties with memory, thinking, or mood. A group of Chinese researchers have investigated whether reduced blood flow to the brain is connected to heart strain and disease severity. They compared brain scans from 30 people with pulmonary arterial hypertension and 51 healthy individuals matched for age and sex. The scans assessed blood flow across different brain regions. They also reviewed cardiac tests, walking capacity, and clinical risk classification.
Patients with pulmonary arterial hypertension showed reduced blood flow in several brain regions involved in memory, thinking, and emotional regulation. Lower brain blood flow was linked to greater enlargement and strain of the right side of the heart, and this pattern was more pronounced in patients classified at intermediate or high risk.
These findings suggest that a brain scan measuring blood flow could offer useful additional insight into disease severity and its effects on the brain. That said, this was a small, single-center study and cannot establish cause and effect. Larger, longitudinal studies are needed.
Read more at this link on Sage Journals
Citation
Hou P, Ke M, Jiang Q, Lai N, Zhong S, Zhao R, Sun C, Wang G, Zhang J, Geng Y, Fu Y, Liu C, Wang X. Cerebral hypoperfusion in pulmonary arterial hypertension: Association with right ventricular dysfunction and risk stratification. Ther Adv Respir Dis. 2026 Jan-Dec;20:17534666261485141. doi: 10.1177/17534666261485141. Epub 2026 Sep 2. PMID: 42685161.