A Secret in the Eyes

In a study reported in the American Heart Association journal Hypertension, researchers said retinal imaging may someday help assess if you’re more likely to have a stroke.



“The retina provides information on the status of blood vessels in the brain,” said Mohammad Kamran Ikram, M.D., Ph.D., lead author of the study and assistant professor in the Singapore Eye Research Institute, the Department of Ophthalmology and Memory Aging & Cognition Centre at the National University of Singapore. “Retinal imaging is a non-invasive and cheap way of examining the blood vessels of the retina.”

Worldwide, high blood pressure is the single most important risk factor for stroke. However, it’s still not possible to predict which high blood pressure patients are most likely to develop a stroke.

Researchers tracked stroke occurrence for an average 13 years in 2,907 patients with high blood pressure who had not previously had a stroke. At baseline, each had photographs taken of the retina, the light-sensitive layer of cells at the back of the eyeball. Damage to the retinal blood vessels attributed to hypertension — called hypertensive retinopathy — evident on the photographs was scored as none, mild or moderate/severe.

During the follow-up, 146 participants experienced an ischemic stroke and 15 had a bleeding stroke.

After adjusting for other stroke risk factors, they found the risk of stroke was 35 percent higher in those with mild hypertensive retinopathy and 137 percent higher in those with moderate or severe hypertensive retinopathy.

Even in patients on medication and achieving good blood pressure control, the risk of a blood clot was 96 percent higher in those with mild hypertensive retinopathy and 198 percent higher in those with moderate or severe hypertensive retinopathy.

“It is too early to recommend changes in clinical practice,” Ikram said. “Other studies need to confirm our findings and examine whether retinal imaging can be useful in providing additional information about stroke risk in people with high blood pressure.”

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Stroke Rehabilitation

Making the Best Decisions at Discharge After Stroke

The type of rehabilitation and support systems a survivor receives at discharge can strongly influence health outcomes and recovery. In this, the first part of a two-part series on stroke rehab, we offer guidance for the decision-making process required when it’s time to leave the hospital.

What to Expect from Outpatient Rehab

After stroke, about two-thirds of survivors receive some type of rehabilitation. Outpatient therapy may consist of Several types of therapy. Whether a patient is referred to inpatient or outpatient therapy depends on the level of medical care required.

What to Expect in Stroke Rehab

Following a stroke, about two-thirds of survivors receive some type rehabilitation. In this second of our two-part series, we want to alleviate some of the mystery, fear and anxiety around the inpatient rehab part of the stroke recovery journey.
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AHA-ASA Resources

The Support Network

When faced with challenges recovering from heart disease or stroke, it’s important to have emotional support. That is why we created a network to connect patients and loved ones with others during their journey.

Caregiver Guide to Stroke

The Caregiver Guide to Stroke is meant to help caregivers better navigate the recovery process and the financial and social implications of a stroke.

Stroke Support Group Finder

To find a group near you, simply enter your ZIP code and a mile radius. If your initial search does not pull up any groups, try

Tips for Daily Living Library

This volunteer-powered library gathers tips and ideas from stroke survivors, caregivers and healthcare professionals all over the country who’ve created or discovered adaptive and often innovative ways to get things done!

Stroke Family Warmline

The Warmline connects stroke survivors and their families with an ASA team member who can provide support, helpful information or just a listening ear.

Let's Talk About Stroke Patient Information Sheets

Let's Talk About Stroke is a series of downloadable patient information sheets, created by the American Stroke Association, that presents information in a question-and-answer format that's brief, easy to follow and easy to read.

Request Free Stroke Information Packets

Fill out this online form to request free information about a variety of post-stroke topics.
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Stroke & Parts of the Brain

When Stroke Affects the Cerebellum

The cerebellum contains 80 percent of our neurons. Its job seems to be to make things better. We talked with neuroscientist Jeremy Schmahmann about how stroke affects the “little brain.”

When Stroke Affects the Parietal Lobe

The parietal lobe helps us make sense of sensory information, like where our bodies and body parts are in space, our sense of touch, and the part of our vision that deals with the location of objects.

When Stroke Affects the Frontal Lobe

Of the four lobes that make up the cerebral cortex, the frontal lobe is the largest. It plays a huge role in many of the functions that make us human — memory, language, movement, judgment, abstract thinking.

When Stroke Affects the Temporal Lobe

The temporal lobe has several functions, mainly involved with memory, perception and language.

When Stroke Affects the Brain Stem

The brain stem serves as a bridge in the nervous system. It sits at the top of the spinal column in the center of the brain. When a stroke happens there, it can cause a few different deficits and, in the most severe cases, can lead to locked-in syndrome.

When Stroke Affects the Thalamus

The thalamus can be thought of as a "relay station," receiving signals from the brain’s outer regions (cerebral cortex), interpreting them, then sending them to other areas of the brain to complete their job.
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Departments

Stroke Notes

Stroke-related news you can use about new scientific findings, public policy, programs and resources.

Readers Room

Articles, poems and art submitted by stroke survivors and their loved ones.

Life Is Why

Everyone has a reason to live a longer, healthier life. These stroke survivors, caregivers and others share their 'whys'. We'd love for you to share yours, too!

Everyday Survival

Practical tips and advice for day-to day living after stroke.

Life At The Curb

A unique perspective on survival by comedian and stroke survivor John Kawie.

Simple Cooking

Cooking at home can be a daunting task, but a rewarding one for your diet and lifestyle (and your wallet). Making small changes in your diet is important to your heart health. Here are simple, healthy and affordable recipes and cooking tips.

Helping Others Understand

Stroke affects people differently and many of the effects of stroke can be complicated. Helping friends and family understand how a stroke is affecting a survivor can help everyone involved.

Support Showcase

Our new department highlighting the good work being done by stroke support groups from around the nation. If you are part of a successful support group we should consider featuring, let us know!