Aortitis overview

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Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Aortitis from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

Chest X Ray

CT

MRI

Echocardiography or Ultrasound

Other Imaging Findings

Other Diagnostic Studies

Treatment

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]

Overview

Aortitis is the inflammation of the aortic wall. The disorder is potentially life-threatening and rare. Aortitis is found in a wide range of ages spanning from 10 to 40 years of age.

Classification

Aortitis may be classified according to the cause into 2 groups: inflammatory and infectious[1][2].

Pathophysiology

Aortitis is inflammation or infection of the aortic wall.[2] On microscopic histopathological analysis, extensive intimal and adventitial fibrosis and scarring with resultant luminal narrowing are characteristic findings of aortitis due to Takayasu arteritis. Extensive medial inflammation and necrosis are characteristic findings on microscopic histopathological analysis of aortitis due to giant cell arteritis.[2] The majority of cases of infectious aortitis are due to bacteria seeding through a segment of the aortic wall with existing pathology via the vasa vasorum.

Causes

Life threatening causes of aortitis include bacteremia and mycotic aneurysm. Common causes of aortitis include ankylosing spondylitis, giant cell arteritis, Takayasu arteritis, and syphilis.

Differential Diagnosis

Aortitis must be differentiated from aortic dissection, intramural hematoma, and penetrating atherosclerotic ulcer.[2]

Natural History, Complications, and Prognosis

If left untreated, infectious aortitis is associated with a high rate of aortic rupture and subsequent mortality. Aortitis due to either giant cell arteritis or Takayasu arteritis has a high rate of recurrence despite therapy.[2] Common complications of aortitis include: aortic aneurysm, aortic rupture, aortic dissection, thrombus formation in the aortic lumen, and hypertension. The prognosis of infectious aortitis is generally poor. Prognosis of isolated aortitis and aortitis associated with rheumatic diseases is generally good with prompt diagnosis.[3]

Diagnosis

History and Symptoms

Symptoms of aortitis include back pain, fever, abdominal pain, chest pain, shortness of breath, and fatigue.

Physical Examination

Common physical examination findings of aortitis include abnormal heart sounds, hypertension or hypotension, a difference in blood pressure between both arms, and either reduced or absent pulses.[4]

Laboratory Findings

Laboratory findings consistent with the diagnosis of aortitis include elevated erythrocyte sedimentation rate and C-reactive protein.[5]

CT

CT scan with the administration of iodinated contrast (CTA) may be diagnostic of aortitis. Findings on CT suggestive of aortitis include thickening of the aortic wall and periaortic inflammation. CT scan may also be helpful in the diagnosis of the complications of aortitis. Findings on CT suggestive of complications of aortitis include aortic and arterial calcification, stenotic lesions of the aorta, aortic aneurysm, and luminal thrombus.[2]

MRI

Magnetic resonance angiography (MRA) is the noninvasive imaging of choice for aortitis. On MRA, aortitis is characterized by stenoses at multiple levels, mural thrombi, and thickening of aortic valve cusps.

Echocardiography and Ultrasound

On transthoracic and transesophageal echocardiogram, aortitis is characterized by aortic wall thickening.[6] Echocardiography may also be helpful in the assessment of aortic root and aortic valve involvement in aortitis.[2] Findings on ultrasound suggestive of Takayasu arteritis include extensive concentric thickening of affected aorta and branch vessels.[7] Findings on ultrasound suggestive of giant cell arteritis include a "halo" sign, aortic wall thickening, and small aneurysms.[2]

Treatment

Medical Therapy

Early antimicrobial therapy with broad spectrum coverage is indicated in infectious aortitis. The preferred agents include either Cefotaxime, Ciprofloxacin, penicillinase-resistant penicillins, or Vancomycin. Surgical debridement is recommended among patients with gram-negative rod aortitis.

Prognosis

References

  1. Bronze MS, Shirwany A, Corbett C, Schaberg DR (1999). "Infectious aortitis: an uncommon manifestation of infection with Streptococcus pneumoniae". The American Journal of Medicine. 107 (6): 627–30. PMID 10651596. Unknown parameter |month= ignored (help)
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Gornik HL, Creager MA (2008). "Aortitis". Circulation. 117 (23): 3039–51. doi:10.1161/CIRCULATIONAHA.107.760686. PMC 2759760. PMID 18541754. Unknown parameter |month= ignored (help)
  3. "Isolated aortitis".Accessed on September 14th, 2015
  4. Accessed on September 11th, 2015 "Isolated Aortitis" Check |url= value (help).
  5. "Aortitis".Accessed on September 11th, 2015
  6. Harris KM, Malenka DJ, Plehn JF (1997). "Transesophageal echocardiographic evaluation of aortitis". Clin Cardiol. 20 (9): 813–5. PMID 9294676.Accessed on September 14th, 2015
  7. Hartlage GR, Palios J, Barron BJ, Stillman AE, Bossone E, Clements SD; et al. (2014). "Multimodality imaging of aortitis". JACC Cardiovasc Imaging. 7 (6): 605–19. doi:10.1016/j.jcmg.2014.04.002. PMID 24925329.


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