Your Eyes May Hold Clues to Stroke Risk
“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 experienced 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 a stroke caused by a blood clot and 15 by bleeding in the brain.
Researchers adjusted for several stroke risk factors such as age, sex, race, cholesterol levels, blood sugar, body mass index, smoking and blood pressure readings. 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.”
Source: American Heart Association
Published on : Wed, 14 Aug 2013
Print as PDF
The fully featured ICU ventilator, HAMILTON-MR1, guarantees uncompromised continuous ventilation care from the ICU to the MRI scanner and back. Its reliability and high performance, with advanced lung-protective strategies and patient-adaptive modes,...
Medos hemofilters pro are used for efficient and gentle hemofiltration during extracorporal circulation.Medos hemofilters pro do not need to be pre-flushed and can be used immediately. This guarantees a safe and quick hemofiltration.
NovaPort cannulas: The safe access to the vascular system. NovaPort® twin double lumen cannulas are specifically developed for veno-venous vascular access. NovaPort one single lumen cannulas are specifically developed for the percutaneous connection (KU)...
Monitor vital signs of sensitive patients with reliable, smart and intuitive technology Not available in the US Sensitive patients, like neonates, require comfortable care. With transcutaneous monitoring, you can easily keep track of the oxygenation...