SM 249: Vasculitis Flashcards
What are the large vessels?
Aorta and it’s branches: elastic arteries
What are elastic arteries?
Arteries that allow for expansion and recoil, maintaining blood pressure during Diastole
Are large vessels elastic or muscular arteries?
Large vessels like the Aorta and it’s branches are elastic arteries
What are muscular arteries?
Arteries with more smooth muscle and some autonomic control as a result
What are Arterioles?
Arteries with the most smooth muscle and the most autonomic control, allowing them to control local blood flow
Describe the structure of a capillary?
A single endothelial layer optimized for nutrient and gas exchange
How does vascular inflammation effect vessels?
Vascular inflammation can lead to obstruction, loss of vessel integrity, and aneurysm formation
How are Vasculitis classified?
By vessel size:
Large Vessel Vasculitis
Medium Vessel Vasculitis
ANCA Small Vessel Vasculitis
Immune Complex Small Vessel Vasculitis
What are the large vessel vasculitis?
Takayasu Arteritis and Giant Cell Arteritis
What are the medium vessel vasculitis?
Polyarteritis Nodosa
Kawasaki Disease
What are the ANCA associated small vessel vasculitis?
MPA
GPA
EPA
What are the Immune Complex small vessel vasculitis?
Cryoglobulinemic Vasculitis
IgA Vasculitis
Hypocomplemntemic Utricarial Vasculitis
Anti-GBM Disease
What is the most common form of arteritis?
Giant Cell Arteritis
Who does Giant Cell Arteritis effect the most?
Scandinavian women more often than men, around 73 y/o
What causes Giant Cell Arteritis?
Uknown
What vessels are effected by Giant Cell Arteritis?
Multinucleated giant cells and granulomas in the Internal Elastic Lamina of large vessels
Cranial involvement
How does Giant Cell Arteritis present?
New headache, polymyalgia, jaw claudication, vision loss, and constitutional symptoms
What lab abnormalities accompany GCA?
Elevated ESR and CRP as well as Thrombocytosis
What imaging should be ordered if GCA is suspected?
Temporary Artery Ultrasound and MRA
What artery should be biopsied and how quickly in GCA?
Biopsy the Temporal artery ASAP
How is GCA treated?
High dose corticosteroids and Tocilizumab
What is Tocilizumab?
An anti-IL-6 therapy
What is Takayasu Arteritis?
A large vessel vasculitis that can affect any artery but mainly the Aorta/Sublcavian/Carotids, leading to stenosis, dilation, and aneurysm formation
Who is affected by Takayusu Arteritis?
Most common in Asia, women > men and age < 40
How does Takayusu Arteritis present?
Extremity pain/claudication, bruits, lightheadedness, and diminished pulses or large BP difference
What lab abnormalities is Takayusu Arteritis associated with?
No specific abnormalities, ESR/CRP may or may not be elevated
What pathology is associated with Takayusu Arteritis?
Granulomatous panarteritis, intimal hyperplasia, and fixed stenosis/occlusions
What imaging should be ordered with Takayusu Arteritis?
CTA/MRA > Angiography
What is the treatment for Takayusu Arteritis?
High dose corticosteroids (empirically)
Why is early recognition and initiation of therapy critical Takayusu Arteritis?
Aortic regurg and acute MI are frequent complications that lead to death
What is Polyarteritis Nodosa?
A systemic necrotizign vasculitis of medium-sized muscular arteries
What causes Polyarteritis Nodosa?
Associated with HBV but may also be idiopathic
Who is effected by Polyarteritis Nodosa?
Men between the age of 40-60 typically
What is the pathology of Polyarteritis Nodosa?
Transmural inflammation without giant cells or granulomas
How does PAN present?
Cutaneous nodules, Renal Disease, Neuropathy, GI Ischemia