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Endocarditis of prosthetic aortic valve — Clinical Guidelines

Overview

Endocarditis involving a prosthetic aortic valve is a serious infection that can lead to significant morbidity and mortality, often requiring surgical intervention due to complications such as abscess formation and valve destruction 2 3.

Diagnosis

Key Diagnostic Criteria: Presence of fever, new heart murmur, and signs of systemic infection 2.

Recommended Tests: Transesophageal echocardiography (TEE) is crucial for identifying perivalvular abscesses and assessing valve involvement 3.

Grading: Valve vegetations and abscesses are graded based on size and extent, often requiring imaging for accurate assessment 3.

Management

First-Line Treatment: Intravenous antibiotics tailored to culture and sensitivity results, targeting common pathogens like Staphylococcus aureus 3.

Adjunctive Treatments: Surgical intervention is often necessary for valve replacement, especially in cases of severe valve destruction or abscess formation 2 3.

Specific Considerations: High doses of catecholamines and preoperative septic shock indicate a need for urgent surgical evaluation 2.

Special Populations

Comorbidities: Patients with prosthetic valves have higher early mortality rates compared to those with native valves, particularly if they develop septic shock or require ventilation preoperatively 2.

Prognosis Variations: Patients with congenitally malformed valves have better outcomes with surgical intervention compared to those with prosthetic valves 3.

Key Recommendations

Utilize Transesophageal Echocardiography (TEE) for Early Detection of Perivalvular Abscesses to improve prognosis and guide management 3 (Evidence: Moderate).

Surgical Intervention Should Be Considered Urgently in Cases of Severe Valve Destruction or Abscess Formation, especially in prosthetic valve endocarditis 2 3 (Evidence: Moderate).

Tailor Antibiotic Therapy Based on Culture and Sensitivity Results, with particular attention to Staphylococcus aureus as a common pathogen 3 (Evidence: Moderate).

References

1 Dubois D, Dozier A, Schurtz G, Pontana F, Lemesle G. Extended emphysematous aortitis of the ascending aorta: An unusual fatal presentation of aortic valve endocarditis due to Clostridium Septicum. Cardiology journal 2022. link 2 Musci M, Weng Y, Hübler M, Chavez T, Qedra N, Kosky S et al.. Predictors of early mortality in patients with active infective native or prosthetic aortic root endocarditis undergoing homograft aortic root replacement. Clinical research in cardiology : official journal of the German Cardiac Society 2009. link 3 Lerakis S, Robert Taylor W, Lynch M, Litman CM, Clements SD, Thompson TD et al.. The role of transesophageal echocardiography in the diagnosis and management of patients with aortic perivalvular abscesses. The American journal of the medical sciences 2001. link

Endocarditis of prosthetic aortic valve