Surgical considerations in aortitis. Part II: Mycotic aneurysms
Related Experiment Video
Updated: Aug 23, 2026

Microsurgical Creation of Giant Bifurcation Aneurysms in Rabbits for the Evaluation of Endovascular Devices
Published on: September 8, 2023
1Division of Surgery, Texas Heart Institute of St. Luke's Episcopal and Texas Children's Hospitals, Houston, Texas 77225, USA.
Abstract:
Mycotic aneurysms were first described as the result of nonsyphilitic bacterial infection of the arterial wall. They were often caused by septic emboli from bacterial endocarditis and were much more common prior to the era of antibiotics. Although the aorta is most often affected, such aneurysms may arise in any artery. Classified according to their etiology as primary, secondary, and cryptic mycotic aneurysms, it is imperative that immediate treatment be instituted once the diagnosis is confirmed by angiography. The patient should be placed on high doses of antibiotics appropriate for the offending pathogens. The goal of surgical treatment is the complete removal of the infected aneurysm and preservation of the distal circulation. Alternate methods of treating these lesions include the use of bypass grafts and interposition grafts. The virulence of the offending pathogen and the sensitivity to antibiotic therapy play a significant role in the success of these procedures.
Insights
Mycotic aneurysms, arterial infections often from bacterial endocarditis, require prompt diagnosis and treatment. Immediate antibiotic therapy and surgical intervention, including aneurysm removal or grafting, are crucial for successful outcomes.
Area of Science:
- Vascular Surgery
- Infectious Diseases
- Cardiology
Background:
- Mycotic aneurysms result from nonsyphilitic bacterial infection of the arterial wall, often from septic emboli.
- These aneurysms were more prevalent before antibiotics but can affect any artery, commonly the aorta.
- Classified as primary, secondary, or cryptic, early diagnosis is essential.
Purpose of the Study:
- To outline the diagnostic and treatment strategies for mycotic aneurysms.
- To emphasize the importance of timely intervention in managing arterial infections.
- To discuss surgical goals and alternative treatment methods.
Main Methods:
- Diagnosis confirmed by angiography.
- Treatment involves high-dose antibiotics tailored to the identified pathogens.
- Surgical management focuses on complete infected aneurysm removal and distal circulation preservation.
Main Results:
- Successful treatment depends on pathogen virulence and antibiotic sensitivity.
- Surgical options include bypass grafts and interposition grafts.
- Prompt treatment improves patient outcomes.
Conclusions:
- Immediate treatment, including antibiotics and surgery, is imperative for mycotic aneurysms.
- Complete aneurysm excision and preservation of blood flow are key surgical goals.
- Pathogen characteristics significantly influence treatment success.
Related Concept Videos
Aneurysm III: Interprofessional Care
Aneurysm IV: Nursing Management
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Aneurysm I: Introduction
Myocarditis III: Medical Management
Endocarditis III: Medical Management

