Abstract
Background: The incidence of hypertension increases with age, as does that of brain abnormalities associated with cerebral pathologic and functional degeneration. Little is known about the relationship between hypertension-related cardiac changes and cerebral pathologic degeneration. We examined the relationship between left ventricular (LV) diastolic dysfunction and cerebral white matter hyperintensity (WMH) progression in young-old hypertensive patients.
Methods and Results: This single-center prospective longitudinal observational study included 156 individuals aged 65–75 years with well-controlled hypertension, normal LV contraction, and no history of symptomatic heart failure. WMH was quantified on brain magnetic resonance imaging (MRI). The primary outcome was the rate of WMH volume progression between the baseline and follow-up MRI (∆WMH). Participants were classified into tertiles on the basis of ∆WMH (small, medium, and large ∆WMH). The mean (±SD) age at recruitment was 69.6±2.8 years, and the mean follow-up period was 4.6 years. The ratio of early diastolic mitral inflow velocity to early diastolic septal mitral annulus velocity (septal E/e′) was significantly higher in the large ∆WMH group than in the small and medium ∆WMH groups. On multiple regression analysis, septal E/e′ was significantly positively associated with square-root-transformed ∆WMH (β=0.457, P<0.001).
Conclusions: Septal E/e′ was significantly positively associated with the rate of progression of WMH volume, suggesting that LV diastolic dysfunction is associated with the progression of abnormal brain aging.
