Abstract
ABSTRACT Arterial hypertension is the most prevalent non-communicable disease worldwide, and has long been recognized as a major risk factor for cardiovascular and cerebrovascular diseases. High blood pressure has deleterious consequences on the main target organs (heart, kidney, brain), and several studies have shown that brain damage is more frequent than heart and kidney involvement. Silent lesions can subsequently lead to cognitive decline, dementia or stroke. Nevertheless, screening for subclinical brain deterioration is rarely performed because it requires imaging techniques whose scarcity and high cost rule out routine use by primary care physicians. The challenge is thus early detection of asymptomatic brain lesions with cost-effective techniques to test thousands of patients in the community. In this review we present an update on the status of biomarkers explored as alternatives for early detection of brain damage in arterial hypertension, potentially useful to identify patients needing referrals for brain MRI: ambulatory blood pressure monitoring, quantitative retinal microvascular assessment, quantitative electroencephalography, carotid ultrasonography, neurocognitive studies and blood-based biomarkers. We place special emphasis on blood-based biomarkers, for which our group reported the first preliminary evidence of an association between serum neuron-specific enolase and severity of white matter lesions in patients with essential hypertension. This review consequently explores the potential for blood-based biomarkers to provide a faster, cheaper and more accessible early-detection solution, particularly beneficial in resource-limited settings such as Cuba’s.
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