Related Experiment Video
Updated: Oct 15, 2025
07:46
Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat
Published on: June 4, 2012
16.1K
Infective Endocarditis Caused by Staphylococcus aureus After Transcatheter Aortic Valve Replacement
David Del Val1, Mohamed Abdel-Wahab2, Norman Mangner3
1Québec Heart & Lung Institute, Laval University, Québec City, Québec, Canada.
The Canadian Journal of Cardiology
|October 24, 2021
Summary
Staphylococcus aureus infective endocarditis (SA IE) affects nearly 25% of patients after transcatheter aortic valve replacement (TAVR), leading to significantly higher mortality. Early identification of risk factors and surgical intervention are crucial for improved outcomes in SA IE after TAVR.
Area of Science:
- Cardiology
- Infectious Diseases
- Medical Devices
Background:
- Staphylococcus aureus (SA) is a known cause of infective endocarditis (IE) in patients with surgically implanted prosthetic valves.
- Evidence regarding SA IE specifically after transcatheter aortic valve replacement (TAVR) is limited.
Purpose of the Study:
- To investigate the incidence, characteristics, and outcomes of SA IE in patients who have undergone TAVR.
- To identify risk factors associated with SA IE post-TAVR.
- To compare mortality rates between SA IE and non-SA IE patients after TAVR.
Main Methods:
- Utilized data from the Infectious Endocarditis After TAVR International Registry, comprising patients from 59 centers in 11 countries.
- Classified patients into two groups: SA IE and non-SA IE.
- Analyzed clinical features, risk factors, and mortality outcomes.
Main Results:
- SA IE was diagnosed in 24.6% of 573 TAVR patients, predominantly methicillin-sensitive SA.
- Risk factors such as major bleeding, sepsis, neurologic symptoms, systemic embolism, and cardiac device involvement were associated with SA IE.
- SA IE was linked to significantly higher in-hospital (47.8% vs 26.9%) and 2-year (71.5% vs 49.6%) mortality rates.
- Surgery during the index SA IE episode correlated with reduced mortality compared to medical management alone.
Conclusions:
- SA IE constitutes a significant portion of IE cases post-TAVR, associated with substantial mortality.
- Identifying specific risk factors can aid in early antibiotic selection for SA IE.
- Surgical intervention for SA IE warrants further investigation for improved patient outcomes.
Related Concept Videos
01:25Endocarditis I: Introduction
64
Introduction:Endocarditis is the infection of the endocardium, the inner lining of the heart and its valves. When the heart muscle is involved, the condition is termed myocarditis, while an infection of the outer lining is called pericarditis. Infective endocarditis (IE) primarily affects the endocardium, where pathogens adhere to the valves or lining, forming vegetation that can lead to severe complications. Infective endocarditis occurs when microorganisms, usually bacteria from other body...
64
01:18Endocarditis III: Medical Management
45
Infective endocarditis management involves a multifaceted approach encompassing infection prevention, lifestyle modifications, pharmacological therapy, and surgical management.Infection Prevention:Hand Hygiene: Thorough handwashing is crucial to prevent the spread of infection. Hand hygiene should be performed regularly, especially before and after using the restroom.Oral Hygiene: Good oral hygiene is essential. It includes brushing teeth immediately after waking up and before bed, flossing...
45
01:25Endocarditis II: Clinical Features of Infective Endocarditis
48
Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
48
01:29Endocarditis IV: Nursing Management
83
Infective endocarditis (IE) is a chronic infection of the heart's endocardium, primarily affecting the heart valves. A detailed nursing assessment for a patient with IE involves collecting subjective and objective data to ensure an accurate diagnosis and timely intervention.Subjective DataThe nurse gathers information about the patient's symptoms and complaints during the subjective assessment. Patients with infective endocarditis often report non-specific symptoms that can mimic other...
83
01:15Aortic Regurgitation I: Introduction
71
IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
71
01:26Aneurysm III: Interprofessional Care
53
Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
53