Enlarged Basal Ganglia Perivascular Spaces are Associated with Pulsatile Components of Blood Pressure.

BACKGROUND/AIMS: Pathogenetic mechanisms involved in enlargement of basal ganglia perivascular spaces (BG-PVSs) are controversial. Here, we assessed whether pulsatile or steady components of blood pressure (BP) are associated with enlarged BG-PVS.

METHODS: We evaluated the association between BG-PVS and pulsatile and steady components of BP in Atahualpa residents aged ≥60 years, by the use of regression models and receiver operator characteristics (ROC) curve analysis, after taking into account the effect of demographics, cardiovascular risk factors, and other signatures of cerebral small vessel disease (SVD).

RESULTS: Of 437 candidates, 363 (83%) were included. MRI showed >10 enlarged BG-PVS in 103 (28%) subjects. In univariate analysis, the association between enlarged BG-PVS and systolic pressure (SP) and pulse pressure (PP) were highly significant, while the association with diastolic pressure (DP) was not. ROC curve analysis showed a higher area under the curve for PP than for DP (p < 0.05). The area under the curve for SP was also higher than that of DP, but not significantly better due to overlapping 95% CI.

CONCLUSION: Enlarged BG-PVS are associated with pulsatile components of BP, although some of the effect is taken away by the strong interaction between BG-PVS and other signatures of SVD.