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Related Concept Videos

Endocarditis I: Introduction01:25

Endocarditis I: Introduction

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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...
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Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

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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...
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Endocarditis III: Medical Management01:18

Endocarditis III: Medical Management

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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...
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Endocarditis IV: Nursing Management01:29

Endocarditis IV: Nursing Management

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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...
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Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

235
Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

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The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
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Related Experiment Video

Updated: Jan 7, 2026

An In Vitro Model of a Parallel-Plate Perfusion System to Study Bacterial Adherence to Graft Tissues
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Clinical and Prognostic Differences Between Mechanical Versus Biological Prosthetic Infective Endocarditis-A

Juan Esteban de Villarreal-Soto1, Jorge Calderón Parra2, Patricia Muñoz García3

  • 1Cardiac Surgery Department, Hospital Universitario Puerta de Hierro Majadahonda, 28222 Majadahonda, Spain.

Journal of Clinical Medicine
|December 30, 2025
PubMed
Summary
This summary is machine-generated.

Biological prosthetic valve endocarditis (PVE) occurs earlier and has more complications than mechanical PVE. However, mechanical PVE is associated with higher in-hospital mortality, particularly due to Staphylococcus aureus infections.

Keywords:
biological prosthesisendocarditismechanical prosthesisregistryvalve surgery

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Area of Science:

  • Cardiology
  • Infectious Diseases
  • Cardiac Surgery

Background:

  • Infective endocarditis (IE) is a severe complication, with prosthetic valve endocarditis (PVE) accounting for a significant portion and high mortality.
  • Understanding the differences between biological and mechanical PVE is crucial for patient management and outcomes.

Purpose of the Study:

  • To compare baseline characteristics, microbiology, clinical presentation, complications, and prognosis between biological PVE (bPVE) and mechanical PVE (mPVE).
  • To conduct a subgroup analysis for patients aged 45-65 undergoing prosthetic surgery.

Main Methods:

  • Post hoc analysis of a prospective multicenter cohort of PVE patients (January 2008 - December 2023).
  • Patients were categorized into mechanical PVE (mPVE) and biological PVE (bPVE) groups.
  • Multivariable logistic regression was used to identify mortality risk factors.

Main Results:

  • bPVE presented earlier than mPVE and had more healthcare-associated infections and paravalvular issues.
  • mPVE showed a higher incidence of Staphylococcus aureus and Gram-negative bacteria, while bPVE had more coagulase-negative staphylococci.
  • Independent mortality risk factors included EuroSCORE I, age, mPVE, S. aureus, multi-valve IE, and severe sepsis. mPVE had higher in-hospital mortality, linked to septic shock and CNS embolism.

Conclusions:

  • bPVE occurs earlier than mPVE, even in the 45-65 age group, and is associated with increased healthcare-related infections and paravalvular complications.
  • Despite differences in presentation and complications, mPVE demonstrated higher in-hospital mortality after adjusting for baseline factors.