Rachel Eikelboom, Roberto Vanin Pinto Ribeiro, Rashmi Nedadur, and Bobby Yanagawa
Central Message.
Large vegetation of a xenopericardial elephant trunk graft is an unusual cause of aortic obstruction.
See Article page 46.
In this edition of the Journal, Minegishi and colleagues1 present a patient who underwent total arch replacement with elephant trunk for type A dissection. She developed an Enterobacter cloacae graft infection and underwent redo total arch replacement with xenopericardial roll graft. She then developed fungal infection of the elephant trunk with a near-occlusive vegetation and had redo-redo-descending aortic replacement via left chest. To our knowledge, this is the first report of a massive vegetation on an elephant trunk as a cause of near occlusion. That this surgical team successfully performed 3 high-risk operations is a tour de force and a tribute to the resilience of the surgical team and indeed the patient.
Thoracic aortic prosthetic graft infection has an incidence of less than 3% but is associated with 25% to 75% mortality.2 There is limited evidence to guide management, although some strategies include a combination of (1) reoperation with aggressive debridement and aortic replacement with a rifampin-soaked Dacron graft, homograft, or xenopericardial graft; (2) coverage with native tissue (eg, omental) flap; (3) local antibiotic infusion; (4) life-long suppressive antibiotics; and (5) wound drainage with or without negative-pressure dressings.3 Familiarity with the range of therapeutic options, and flexibility in modifying the plan in the face of unanticipated challenges, is key.
In the absence of robust evidence, guidelines for similar conditions can be instructive. The American Heart Association recommends that patients with fungal endocarditis receive parenteral antifungal therapy with amphotericin B plus an additional antifungal agent for a minimum of 6 weeks, followed by consideration of lifelong oral azole therapy.4 Guidelines for intra-abdominal graft infections suggest the use of biologic over prosthetic material. They suggest use of arterial allografts over venous autografts due to the morbidity associated with vein harvest and wound healing, and suggest the use of rifampin- or silver-soaked synthetic grafts.3,5 The basic principle of all infected prosthetic materials is source control with removal of all infected tissue and aggressive debridement. As always, a multidisciplinary team is recommended to include vascular and cardiothoracic surgeons, cardiologists, infectious diseases specialists, and radiologists, so that where evidence is lacking, clinical decision-making can benefit from broad expertise and collaboration.
We thank the authors for sharing this rare presentation of graft occlusion by massive vegetation, and we congratulate the authors on their heroic and innovative surgical strategy which is instructive for those encountering similar challenging scenarios.
Footnotes
Disclosures: The authors reported no conflicts of interest.
The Journal policy requires editors and reviewers to disclose conflicts of interest and to decline handling or reviewing manuscripts for which they may have a conflict of interest. The editors and reviewers of this article have no conflicts of interest.
References
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