[Infection in heart transplantation]

Area of Science:

• Cardiology
• Infectious Diseases
• Transplantation Medicine

Background:

• Heart transplantation is a vital treatment for end-stage heart disease.
• Infectious complications are common post-transplant but are no longer the primary cause of mortality.
• Late infections, especially viral, pose a significant risk to long-term graft survival.

Purpose of the Study:

• To review the landscape of infectious complications following heart transplantation.
• To highlight the impact of specific pathogens like Cytomegalovirus (CMV) and fungi.
• To discuss the evolving strategies in managing and preventing these infections.

Main Methods:

• Literature review of infectious complications in heart transplant recipients.
• Analysis of pathogen prevalence, timing of infections, and associated mortality.
• Evaluation of current prophylactic and therapeutic strategies.

Main Results:

• Bacterial infections, particularly respiratory, are most frequent, often occurring early or late post-transplant.
• Fungal infections have decreased but maintain high mortality; pulmonary aspergillosis is common.
• Cytomegalovirus (CMV) affects 7%-35% of patients; while acute disease is reduced by prophylaxis, its role in allograft vascular disease is concerning.
• Toxoplasmosis incidence has decreased due to prophylaxis in seronegative recipients.

Conclusions:

• While overall mortality from infections has decreased, late-onset infections, especially viral (CMV), remain a threat to graft survival.
• CMV's potential role as a cofactor in allograft vascular disease requires ongoing vigilance and research.
• Effective prophylaxis and pre-emptive therapies have improved outcomes but necessitate continued monitoring and adaptation of strategies.