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Retinal arterial hypertrophy: the new LVH?
Kaivan Khavandi1, Meena Arunakirinathan, Adam S Greenstein
1British Heart Foundation Centre of Excellence, Department of Cardiology, St. Thomas' Hospital, King's College London, London, UK. kaivan.khavandi@kcl.ac.uk
Insights
Hypertension damages small arteries, leading to organ damage like retinopathy and stroke. Retinal artery examination can reveal this damage, offering insights into microvascular complications.
Area of Science:
- Cardiovascular Medicine
- Ophthalmology
- Nephrology
- Neurology
Background:
- Chronic hypertension causes significant cardiovascular sequelae through large artery atherosclerosis and small artery dysfunction.
- Microvascular complications of hypertension include retinopathy, kidney failure, cardiac diastolic dysfunction, and cerebrovascular diseases (stroke, dementia, depression).
Purpose of the Study:
- To review evidence linking retinal artery abnormalities to target organ damage in hypertensive patients.
- To explore the mechanisms by which hypertension and diabetes alter small artery structure and function, contributing to organ damage.
Main Methods:
- Literature review of studies examining retinal vasculature in hypertensive patients.
- Analysis of proposed pathophysiological mechanisms of hypertension and diabetes on small arteries.
Main Results:
- Observable abnormalities in retinal arteries correlate with target organ damage in hypertension.
- Hypertension and diabetes induce fundamental changes in small artery structure and function.
Conclusions:
- Retinal examination is a valuable tool for assessing small artery damage and predicting target organ damage in hypertension.
- Understanding the mechanisms of small artery dysfunction is crucial for preventing hypertension-related complications.
Abstract:
Prevention of target organ damage represents the El Dorado for clinicians who treat hypertension. Although many of the cardiovascular sequelae of chronic hypertension are due to large artery atherosclerosis, an equal number are due to small artery dysfunction. These microvascular complications include eye disease (retinopathy), kidney failure, diastolic dysfunction of the heart and small vessel brain disease leading to stroke syndromes, dementia and even depression. Examination of the retinal vasculature represents the only way to reliably derive information regarding small arteries responsible for these diverse pathologies. This review aims to summarise the rapidly accruing evidence indicating that easily observable abnormalities of retinal arteries reflect target organ damage elsewhere in the body of hypertensive patients. In tandem, we also present putative mechanisms by which hypertension and diabetes fundamentally change small artery structure and function and how these processes may lead to target organ damage.
