Aortic dissection risk factors: Difference between revisions
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* [[Heart surgery]] particularly [[aortic valve replacement]]; 18% of individuals who present with an acute aortic dissection have a history of open heart surgery. Individuals who have undergone [[aortic valve replacement]] for [[aortic insufficiency]] are at particularly high risk. This is because [[aortic insufficiency]] causes increased blood flow in the [[ascending aorta]]. This can cause dilatation and weakening of the walls of the [[ascending aorta]]. | * [[Heart surgery]] particularly [[aortic valve replacement]]; 18% of individuals who present with an acute aortic dissection have a history of open heart surgery. Individuals who have undergone [[aortic valve replacement]] for [[aortic insufficiency]] are at particularly high risk. This is because [[aortic insufficiency]] causes increased blood flow in the [[ascending aorta]]. This can cause dilatation and weakening of the walls of the [[ascending aorta]]. | ||
* [[Hypertension]] is seen in 71-86% of patients. It occurs most frequently in those with type III dissection. | * [[Hypertension]] is seen in 71-86% of patients. It occurs most frequently in those with type III dissection. | ||
* Male gender. The incidence is twice as high in males as in females (male-to-female ratio is 2:1). | |||
* [[Marfan’s syndrome]] is present in 5%-9% of patients. In this subset, there is an increased incidence in young individuals. Individuals with Marfan syndrome patients are more prone to proximal dissections of the aorta. | * [[Marfan’s syndrome]] is present in 5%-9% of patients. In this subset, there is an increased incidence in young individuals. Individuals with Marfan syndrome patients are more prone to proximal dissections of the aorta. | ||
* [[Pseudoxanthoma elasticum]] | * [[Pseudoxanthoma elasticum]] | ||
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* [[Third trimester of pregnancy]]. Half of dissections in females before age 40 occur during [[pregnancy]] (typically in the 3rd trimester or early [[postpartum]] period). | * [[Third trimester of pregnancy]]. Half of dissections in females before age 40 occur during [[pregnancy]] (typically in the 3rd trimester or early [[postpartum]] period). | ||
* [[Vasculitis]] ([[inflammation]] of an artery) is rarely associated with aortic dissection. | * [[Vasculitis]] ([[inflammation]] of an artery) is rarely associated with aortic dissection. | ||
== References == | == References == | ||
Revision as of 18:01, 19 August 2012
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Aortic dissection Microchapters |
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Diagnosis |
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Treatment |
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Special Scenarios |
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Case Studies |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
Overview
Aging, atherosclerosis, diabetes, hypertension and trauma are common risk factors for aortic dissection. Uncommon risk factors include Bicuspid aortic valve, cocaine, Coarctation of the aorta, Cystic medial necrosis, Ehlers-Danlos syndrome, Giant cell arteritis, Heart surgery, Marfan’s syndrome, Pseudoxanthoma elasticum, Turner's syndrome, Tertiary syphilis and the third trimester of pregnancy.
Risk Factors
- Aging. The highest incidence of aortic dissection is in individuals who are 50 to 70 years old.
- Atherosclerosis and its associated risk factors like diabetes
- Bicuspid aortic valve is present in approximately 7%-14% of patients. These individuals are prone to dissection in the ascending aorta. The risk of dissection in individuals with bicuspid aortic valve is not associated with the degree of stenosis of the valve.
- Chest trauma. Chest trauma leading to aortic dissection can be divided into two groups based on etiology: blunt chest trauma (commonly seen in car accidents) and iatrogenic. Iatrogenic causes include trauma during cardiac catheterization or due to an intra-aortic balloon pump.
- Cocaine abuse
- Coarctation of the aorta
- Cystic medial necrosis
- Deceleration trauma most commonly causes aortic rupture, not dissection
- Ehlers-Danlos syndrome
- Giant cell arteritis
- Heart surgery particularly aortic valve replacement; 18% of individuals who present with an acute aortic dissection have a history of open heart surgery. Individuals who have undergone aortic valve replacement for aortic insufficiency are at particularly high risk. This is because aortic insufficiency causes increased blood flow in the ascending aorta. This can cause dilatation and weakening of the walls of the ascending aorta.
- Hypertension is seen in 71-86% of patients. It occurs most frequently in those with type III dissection.
- Male gender. The incidence is twice as high in males as in females (male-to-female ratio is 2:1).
- Marfan’s syndrome is present in 5%-9% of patients. In this subset, there is an increased incidence in young individuals. Individuals with Marfan syndrome patients are more prone to proximal dissections of the aorta.
- Pseudoxanthoma elasticum
- Turner's syndrome. Turner syndrome increases the risk of aortic dissection as a result of aortic root dilatation[1].
- Tertiary syphilis
- Third trimester of pregnancy. Half of dissections in females before age 40 occur during pregnancy (typically in the 3rd trimester or early postpartum period).
- Vasculitis (inflammation of an artery) is rarely associated with aortic dissection.