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"&amp;lt;p&amp;gt;A cryptogenic stroke cannot be attributed to any specific cause after an extensive search for the most common causes, such as cardiac and other &amp;lt;a href=&amp;quot;https://www.verywell.com/embolic-stroke-3146193&amp;quot; data-component=&amp;quot;link&amp;quot; data-source=&amp;quot;inlineLink&amp;quot; data-type=&amp;quot;internalLink&amp;quot; data-ordinal=&amp;quot;1&amp;quot;&amp;gt;emboli&amp;lt;/a&amp;gt;, large or small artery &amp;lt;a href=&amp;quot;https://www.verywell.com/what-is-a-thrombotic-stroke-3146228&amp;quot; data-component=&amp;quot;link&amp;quot; data-source=&amp;quot;inlineLink&amp;quot; data-type=&amp;quot;internalLink&amp;quot; data-ordinal=&amp;quot;2&amp;quot;&amp;gt;thrombi&amp;lt;/a&amp;gt; or &amp;lt;a href=&amp;quot;https://www.verywell.com/atherosclerosis-atherogenic-risk-stroke-3146326&amp;quot; data-component=&amp;quot;link&amp;quot; data-source=&amp;quot;inlineLink&amp;quot; data-type=&amp;quot;internalLink&amp;quot; data-ordinal=&amp;quot;3&amp;quot;&amp;gt;atherosclerosis&amp;lt;/a&amp;gt;.\u00A0It\u2019s estimated that 25 to 30 percent of ischemic strokes are cryptogenic. Studies suggest that the incidence of cryptogenic stroke is higher in African-Americans (two times more likely) and Hispanics (46 percent more likely).&amp;lt;/p&amp;gt;&amp;lt;h3&amp;gt;What is Stroke?&amp;lt;/h3&amp;gt;&amp;lt;p&amp;gt;Stroke is a disease that affects the arteries leading to and within the brain. It is the No. 5\u00A0cause of death and a leading cause of disability in the United States.\u00A0A stroke occurs when a blood vessel that carries oxygen and nutrients to the brain is either blocked by a clot or bursts (or ruptures). When that happens, part of the brain cannot get the blood (and oxygen) it needs, so it and brain cells die.&amp;lt;/p&amp;gt;&amp;lt;table border=&amp;quot;0&amp;quot; cellpadding=&amp;quot;0&amp;quot; cellspacing=&amp;quot;0&amp;quot;&amp;gt;&amp;lt;tbody&amp;gt;&amp;lt;tr&amp;gt;&amp;lt;td&amp;gt;&amp;lt;h3&amp;gt;Types of Stroke&amp;lt;/h3&amp;gt;&amp;lt;p&amp;gt;Stroke can be caused either by a clot obstructing the flow of blood to the brain (called an\u00A0&amp;lt;strong&amp;gt;ischemic stroke&amp;lt;/strong&amp;gt;) or by a blood vessel rupturing and preventing blood flow to the brain (called a\u00A0&amp;lt;strong&amp;gt;hemorrhagic stroke&amp;lt;/strong&amp;gt;).\u00A0A\u00A0&amp;lt;strong&amp;gt;TIA&amp;lt;/strong&amp;gt;\u00A0(transient ischemic attack), or &amp;amp;#34;mini stroke&amp;amp;#34;, is caused by a temporary clot.\u00A0&amp;lt;/p&amp;gt;&amp;lt;/td&amp;gt;&amp;lt;/tr&amp;gt;&amp;lt;tr&amp;gt;&amp;lt;td&amp;gt;&amp;lt;h3&amp;gt;Effects of Stroke&amp;lt;/h3&amp;gt;&amp;lt;p&amp;gt;The brain is an extremely complex organ that controls various body functions.\u00A0 If a stroke occurs and blood flow can&amp;amp;#39;t reach the region that controls a particular body function, that part of the body won&amp;amp;#39;t work as it should.\u00A0&amp;lt;/p&amp;gt;&amp;lt;/td&amp;gt;&amp;lt;/tr&amp;gt;&amp;lt;/tbody&amp;gt;&amp;lt;/table&amp;gt;&amp;lt;h3&amp;gt;Risk Factors\u00A0of\u00A0Stroke&amp;lt;/h3&amp;gt;&amp;lt;ul&amp;gt;&amp;lt;li&amp;gt; &amp;lt;strong&amp;gt;Age&amp;lt;/strong&amp;gt;\u00A0\u2014 The chance of having a stroke approximately doubles for each decade of life after age 55.\u00A0While stroke is common among the elderly, a lot of people under 65 also have strokes.&amp;lt;/li&amp;gt;&amp;lt;li&amp;gt; &amp;lt;strong&amp;gt;Heredity (family history)\u00A0&amp;lt;/strong&amp;gt;\u2014\u00A0Your stroke risk may be greater if a parent, grandparent, sister or brother has had a stroke.\u00A0&amp;lt;/li&amp;gt;&amp;lt;li&amp;gt; &amp;lt;strong&amp;gt;Race&amp;lt;/strong&amp;gt;\u00A0\u2014\u00A0African-Americans have a much higher risk of death from a stroke than Caucasians do.\u00A0This is partly because blacks have higher risks of high blood pressure, diabetes and obesity.&amp;lt;/li&amp;gt;&amp;lt;li&amp;gt; &amp;lt;strong&amp;gt;Sex (gender)&amp;lt;/strong&amp;gt;\u00A0\u2014 Each year, women have more strokes than men, and stroke kills more women than men. Use of birth control pills, pregnancy, history of preeclampsia/eclampsia or gestational diabetes, oral contraceptive use, and smoking, and post-menopausal hormone therapy may pose special stroke risks for women.\u00A0&amp;lt;/li&amp;gt;&amp;lt;li&amp;gt; &amp;lt;strong&amp;gt;Prior stroke, TIA or heart attack&amp;lt;/strong&amp;gt;\u00A0\u2014 The risk of stroke for someone who has already had one is many times that of a person who has not.\u00A0Transient ischemic attacks are &amp;amp;#34;warning strokes&amp;amp;#34; that produce stroke-like symptoms but no lasting damage. TIAs are strong predictors of stroke.\u00A0A person who&amp;amp;#39;s had one or more TIAs is almost 10 times more likely to have a stroke than someone of the same age and sex who hasn&amp;amp;#39;t.\u00A0Recognizing and treating TIAs can reduce your risk of a major stroke.\u00A0TIA should be considered a medical emergency and followed up immediately with a healthcare professional. If you&amp;amp;#39;ve had a\u00A0heart attack, you&amp;amp;#39;re at higher risk of having a stroke, too.&amp;lt;/li&amp;gt;&amp;lt;/ul&amp;gt;&amp;lt;p&amp;gt;&amp;lt;sub&amp;gt;Reference:&amp;lt;/sub&amp;gt;&amp;lt;/p&amp;gt;&amp;lt;p&amp;gt;&amp;lt;sub&amp;gt;American Heart Association. &amp;amp;#34;What&amp;amp;#39;s at the heart of my cryptogenic stroke? http://www.strokeassociation.org/idc/groups/stroke-public/&amp;amp;#64;wcm/&amp;amp;#64;hcm/&amp;amp;#64;sta/documents/downloadable/ucm_477050.pdf&amp;lt;/sub&amp;gt;&amp;lt;/p&amp;gt;&amp;lt;p&amp;gt;&amp;lt;sub&amp;gt;American Stroke Association. http://www.strokeassociation.org/STROKEORG/AboutStroke&amp;lt;/sub&amp;gt;&amp;lt;/p&amp;gt;"^^<http://www.w3.org/2001/XMLSchema#string>
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