{"id":5522,"date":"2025-12-09T19:58:36","date_gmt":"2025-12-10T00:58:36","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/?post_type=chapter&#038;p=5522"},"modified":"2025-12-09T23:17:21","modified_gmt":"2025-12-10T04:17:21","slug":"cerebral-aneurysms","status":"web-only","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/chapter\/cerebral-aneurysms\/","title":{"raw":"11p20  Cerebral Aneurysms","rendered":"11p20  Cerebral Aneurysms"},"content":{"raw":"<strong>Cerebral Aneurysms: Overview, Risks, and Treatments<\/strong>\r\n<h1><strong>What Is a Cerebral Aneurysm?<\/strong><\/h1>\r\n<ul>\r\n \t<li>A\u00a0<strong>weakening<\/strong>\u00a0in the\u00a0<strong>blood vessel wall<\/strong>\u00a0causes a\u00a0<strong>bulge<\/strong>\u00a0or\u00a0<strong>outpouching<\/strong>.<\/li>\r\n \t<li>Most commonly occur in the\u00a0<strong>Circle of Willis<\/strong>, which surrounds the base of the brain.<\/li>\r\n \t<li>The\u00a0<strong>bifurcations<\/strong>\u00a0(forks) in blood vessels create turbulence points, making these areas vulnerable to aneurysm formation.<\/li>\r\n<\/ul>\r\n<h1><strong>Susceptibility and Risk Factors<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Hypertension<\/strong>\u00a0(high blood pressure):\r\n<ul>\r\n \t<li>Increases\u00a0<strong>stress<\/strong>\u00a0on vessel walls.<\/li>\r\n \t<li>Promotes\u00a0<strong>weakening<\/strong>\u00a0and aneurysm development.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Size and symptoms<\/strong>:\r\n<ul>\r\n \t<li>Usually\u00a0<strong>small<\/strong>\u00a0and\u00a0<strong>asymptomatic<\/strong>.<\/li>\r\n \t<li>Symptoms\u00a0<strong>appear only if it ruptures<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Rupture and Its Effects<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Hemorrhage<\/strong>:\r\n<ul>\r\n \t<li>Blood irritates meninges and nerves \u2192\u00a0<strong>headaches<\/strong>.<\/li>\r\n \t<li>Blood release causes\u00a0<strong>vasospasms<\/strong>\u00a0leading to\u00a0<strong>ischemia<\/strong>.<\/li>\r\n \t<li>Severe bleeds can increase\u00a0<strong>ICP<\/strong>\u00a0and cause\u00a0<strong>brain damage<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Signs and Symptoms of Rupture<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Location-dependent<\/strong>:\r\n<ul>\r\n \t<li>Visual pathways:\u00a0<strong>vision loss<\/strong>\u00a0or disturbances.<\/li>\r\n \t<li>Headache,\u00a0<strong>photophobia<\/strong>.<\/li>\r\n \t<li>Brain dysfunction:\u00a0<strong>confusion<\/strong>,\u00a0<strong>slurred speech<\/strong>.<\/li>\r\n \t<li><strong>Neck rigidity (nuchal rigidity)<\/strong>: neck pain due to meningeal irritation.<\/li>\r\n \t<li><strong>Vomiting<\/strong>,\u00a0<strong>seizures<\/strong>,\u00a0<strong>loss of consciousness<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>High mortality<\/strong>:\r\n<ul>\r\n \t<li>35% die from\u00a0<strong>initial rupture<\/strong>.<\/li>\r\n \t<li>15% die after\u00a0<strong>second rupture<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h2><strong>Prevention<\/strong><\/h2>\r\n<ul>\r\n \t<li>Control\u00a0<strong>hypertension<\/strong>.<\/li>\r\n \t<li>Maintain a\u00a0<strong>healthy lifestyle<\/strong>\u00a0and avoid risk factors like smoking.<\/li>\r\n \t<li>Regular check-ups for early detection.<\/li>\r\n<\/ul>\r\n<h1><strong>Treatment Options<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Surgical clipping<\/strong>:\r\n<ul>\r\n \t<li>Open surgery to place a clip around the aneurysm neck.<\/li>\r\n \t<li>Causes aneurysm to\u00a0<strong>atrophy<\/strong>\u00a0and\u00a0<strong>die<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Endovascular coiling<\/strong>:\r\n<ul>\r\n \t<li>Thread a catheter into the aneurysm via angiogram.<\/li>\r\n \t<li>Insert\u00a0<strong>coils<\/strong>\u00a0that induce\u00a0<strong>clot formation<\/strong>\u00a0inside the aneurysm.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Bypass procedures<\/strong>\u00a0(less common):\r\n<ul>\r\n \t<li>Redirect blood flow to prevent stress on aneurysm.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Diagnostic Techniques<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Angiogram<\/strong>:\r\n<ul>\r\n \t<li>Injection of contrast dye.<\/li>\r\n \t<li>Visualizes blood vessels and aneurysm location.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>CT or MRI<\/strong>:\r\n<ul>\r\n \t<li>Confirm blood leakage or structural abnormalities.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Long-term Prevention<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Lifestyle modifications<\/strong>:\r\n<ul>\r\n \t<li>Managing blood pressure.<\/li>\r\n \t<li>Avoiding smoking and drug use.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Summary<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Aneurysms<\/strong>\u00a0are dangerous bulges that risk rupturing with catastrophic bleeding.<\/li>\r\n \t<li>Early detection and\u00a0<strong>preventive management<\/strong>\u00a0are key.<\/li>\r\n \t<li>Surgical and endovascular procedures are effective in\u00a0<strong>preventing ruptures<\/strong>.<\/li>\r\n<\/ul>","rendered":"<p><strong>Cerebral Aneurysms: Overview, Risks, and Treatments<\/strong><\/p>\n<h1><strong>What Is a Cerebral Aneurysm?<\/strong><\/h1>\n<ul>\n<li>A\u00a0<strong>weakening<\/strong>\u00a0in the\u00a0<strong>blood vessel wall<\/strong>\u00a0causes a\u00a0<strong>bulge<\/strong>\u00a0or\u00a0<strong>outpouching<\/strong>.<\/li>\n<li>Most commonly occur in the\u00a0<strong>Circle of Willis<\/strong>, which surrounds the base of the brain.<\/li>\n<li>The\u00a0<strong>bifurcations<\/strong>\u00a0(forks) in blood vessels create turbulence points, making these areas vulnerable to aneurysm formation.<\/li>\n<\/ul>\n<h1><strong>Susceptibility and Risk Factors<\/strong><\/h1>\n<ul>\n<li><strong>Hypertension<\/strong>\u00a0(high blood pressure):\n<ul>\n<li>Increases\u00a0<strong>stress<\/strong>\u00a0on vessel walls.<\/li>\n<li>Promotes\u00a0<strong>weakening<\/strong>\u00a0and aneurysm development.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Size and symptoms<\/strong>:\n<ul>\n<li>Usually\u00a0<strong>small<\/strong>\u00a0and\u00a0<strong>asymptomatic<\/strong>.<\/li>\n<li>Symptoms\u00a0<strong>appear only if it ruptures<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Rupture and Its Effects<\/strong><\/h1>\n<ul>\n<li><strong>Hemorrhage<\/strong>:\n<ul>\n<li>Blood irritates meninges and nerves \u2192\u00a0<strong>headaches<\/strong>.<\/li>\n<li>Blood release causes\u00a0<strong>vasospasms<\/strong>\u00a0leading to\u00a0<strong>ischemia<\/strong>.<\/li>\n<li>Severe bleeds can increase\u00a0<strong>ICP<\/strong>\u00a0and cause\u00a0<strong>brain damage<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Signs and Symptoms of Rupture<\/strong><\/h1>\n<ul>\n<li><strong>Location-dependent<\/strong>:\n<ul>\n<li>Visual pathways:\u00a0<strong>vision loss<\/strong>\u00a0or disturbances.<\/li>\n<li>Headache,\u00a0<strong>photophobia<\/strong>.<\/li>\n<li>Brain dysfunction:\u00a0<strong>confusion<\/strong>,\u00a0<strong>slurred speech<\/strong>.<\/li>\n<li><strong>Neck rigidity (nuchal rigidity)<\/strong>: neck pain due to meningeal irritation.<\/li>\n<li><strong>Vomiting<\/strong>,\u00a0<strong>seizures<\/strong>,\u00a0<strong>loss of consciousness<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>High mortality<\/strong>:\n<ul>\n<li>35% die from\u00a0<strong>initial rupture<\/strong>.<\/li>\n<li>15% die after\u00a0<strong>second rupture<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><strong>Prevention<\/strong><\/h2>\n<ul>\n<li>Control\u00a0<strong>hypertension<\/strong>.<\/li>\n<li>Maintain a\u00a0<strong>healthy lifestyle<\/strong>\u00a0and avoid risk factors like smoking.<\/li>\n<li>Regular check-ups for early detection.<\/li>\n<\/ul>\n<h1><strong>Treatment Options<\/strong><\/h1>\n<ul>\n<li><strong>Surgical clipping<\/strong>:\n<ul>\n<li>Open surgery to place a clip around the aneurysm neck.<\/li>\n<li>Causes aneurysm to\u00a0<strong>atrophy<\/strong>\u00a0and\u00a0<strong>die<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Endovascular coiling<\/strong>:\n<ul>\n<li>Thread a catheter into the aneurysm via angiogram.<\/li>\n<li>Insert\u00a0<strong>coils<\/strong>\u00a0that induce\u00a0<strong>clot formation<\/strong>\u00a0inside the aneurysm.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Bypass procedures<\/strong>\u00a0(less common):\n<ul>\n<li>Redirect blood flow to prevent stress on aneurysm.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Diagnostic Techniques<\/strong><\/h1>\n<ul>\n<li><strong>Angiogram<\/strong>:\n<ul>\n<li>Injection of contrast dye.<\/li>\n<li>Visualizes blood vessels and aneurysm location.<\/li>\n<\/ul>\n<\/li>\n<li><strong>CT or MRI<\/strong>:\n<ul>\n<li>Confirm blood leakage or structural abnormalities.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Long-term Prevention<\/strong><\/h1>\n<ul>\n<li><strong>Lifestyle modifications<\/strong>:\n<ul>\n<li>Managing blood pressure.<\/li>\n<li>Avoiding smoking and drug use.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Summary<\/strong><\/h1>\n<ul>\n<li><strong>Aneurysms<\/strong>\u00a0are dangerous bulges that risk rupturing with catastrophic bleeding.<\/li>\n<li>Early detection and\u00a0<strong>preventive management<\/strong>\u00a0are key.<\/li>\n<li>Surgical and endovascular procedures are effective in\u00a0<strong>preventing ruptures<\/strong>.<\/li>\n<\/ul>\n","protected":false},"author":1370,"menu_order":26,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":["zoe-soon"],"pb_section_license":"cc-by-nc-sa"},"chapter-type":[],"contributor":[60],"license":[57],"class_list":["post-5522","chapter","type-chapter","status-web-only","hentry","contributor-zoe-soon","license-cc-by-nc-sa"],"part":76,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/users\/1370"}],"version-history":[{"count":3,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5522\/revisions"}],"predecessor-version":[{"id":5525,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5522\/revisions\/5525"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/parts\/76"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5522\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/media?parent=5522"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapter-type?post=5522"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/contributor?post=5522"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/license?post=5522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}