Superior vena cava and right atrium wall infective endocarditis in patients receiving hemodialysis

Area of Science:

• Nephrology
• Infectious Diseases
• Cardiology

Background:

• Infective endocarditis (IE) presents higher morbidity and mortality in hemodialysis (HD) patients compared to the general population.
• Bacteremia during HD is frequently associated with vascular access complications, including arteriovenous fistulas, grafts, or catheters.
• Dialysis access infections can lead to secondary bacteremia, increasing the risk of IE.

Observation:

• This study reports on four hemodialysis patients with indwelling intravascular catheters who developed right-sided endocarditis.
• Vegetations were exclusively located on the superior vena cava and right atrium wall in these cases.
• Persistent Staphylococcus bacteremia, secondary to the intravascular dialysis catheter, was identified as the cause.

Findings:

• The findings indicate that Staphylococcus bacteremia originating from dialysis catheters can directly seed the right-sided cardiac walls.
• This leads to a specific form of infective endocarditis with atypical localization in the superior vena cava and right atrium.
• The study identifies a distinct pattern of IE in hemodialysis patients with central venous catheters.

Implications:

• Increasing hemodialysis acceptance rates and improved patient survival may lead to a rise in IE cases.
• Atypical presentations of IE, such as superior vena cava and right-sided cardiac wall endocarditis, require increased clinical awareness.
• This highlights the critical need for stringent infection control measures for vascular access in hemodialysis patients.