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American Stroke Association says a usually-ignored finding in the Kidneys may signal Stroke Risk

American Stroke Association - American Heart AssociationLos Angeles, CA – Sacs of fluid in the kidneys may indicate there is also blood vessel damage in the brain and a heightened risk of stroke, according to preliminary research presented at the American Stroke Association’s International Stroke Conference 2018, a world premier meeting dedicated to the science and treatment of cerebrovascular disease for researchers and clinicians.

Heart disease is the Number 1 killer in the United States. (American Heart Association)
Heart disease is the Number 1 killer in the United States. (American Heart Association)

Renal cysts (sacs of fluid in the kidneys) are common in older people and usually cause no symptoms.

The cysts are often discovered when an ultrasound or CT scan is done for another purpose.

Traditionally, renal cysts are regarded as benign kidney structural changes. Recent research suggests that renal cysts might represent an early stage of kidney damage. Since the kidney and brain have similar vascular anatomy and physiology, researchers wondered whether they might also signal blood vessel damage in the brain circulation and a heightened risk of stroke.

In a study of 2,984 people (average age 72 years, 57 percent female) from the general population in Rotterdam, the Netherlands, who underwent a kidney ultrasound, researchers examined medical records and found:

  • Stroke prevalence was 1.63 times higher in people with a single renal cyst (found in 17 percent of participants) compared to no cysts;
  • Stroke prevalence was even higher (2.14 times higher risk) in those with multiple renal cysts (found in 6.6 percent of participants) compared to those without cysts; and
  • The associations were independent of other stroke risk factors such as high blood pressure, diabetes and age.

The Rotterdam Study is funded by Erasmus Medical Center and Erasmus University, Rotterdam, Netherlands Organization for the Health Research and Development (ZonMw), the Research Institute for Diseases in the Elderly (RIDE), the Ministry of Education, Culture and Science, the Ministry for Health, Welfare and Sports, the European Commission (DG XII), and the Municipality of Rotterdam.

Additional Resources:

Statements and conclusions of study authors that are presented at American Heart Association scientific meetings are solely those of the study authors and do not necessarily reflect association policy or position. The association makes no representation or warranty as to their accuracy or reliability. The association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific association programs and events.

The association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and device corporations are available at www.heart.org/corporatefunding.

About the American Stroke Association

The American Stroke Association is devoted to saving people from stroke — the No. 2 cause of death in the world and a leading cause of serious disability. We team with millions of volunteers to fund innovative research, fight for stronger public health policies and provide lifesaving tools and information to prevent and treat stroke.

The Dallas-based association officially launched in 1998 as a division of the American Heart Association. To learn more or to get involved, call 1.888.4STROKE or visit StrokeAssociation.org.

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