Association Between Microinfarcts and Blood Pressure Trajectories

Area of Science:

• Neurology
• Cerebrovascular Disease
• Aging Research

Background:

• Cerebral microinfarcts are small lesions in the brain associated with cognitive decline.
• Subcortical microinfarcts, specifically, have been linked to blood pressure (BP) changes in elderly populations.
• Understanding the risk factors for microinfarcts is crucial for preventing cognitive impairment.

Purpose of the Study:

• To investigate the association between blood pressure (BP) trajectories and the occurrence of cerebral microinfarcts.
• To determine if BP slopes serve as a risk factor for developing microinfarcts.

Main Methods:

• Analysis of autopsy data from the population-based Mayo Clinic Study of Aging.
• Identification and classification of cerebral microinfarcts (cortical vs. subcortical).
• Comparison of baseline BP and BP trajectories (slopes) between individuals with and without microinfarcts using logistic regression.

Main Results:

• No significant difference in baseline BP was observed between individuals with and without microinfarcts.
• A significant association was found between subcortical microinfarcts and a greater annual decline in both systolic and diastolic BP.
• Cortical microinfarcts did not show a similar association with BP decline.

Conclusions:

• Declining blood pressure (BP) is associated with the presence of subcortical microinfarcts in elderly individuals.
• The findings suggest a potential link between BP changes over time and the development of subcortical microinfarcts.
• Further research is warranted to elucidate the causal direction between declining BP and subcortical microinfarcts.