Immune response following transcatheter aortic valve procedure

Area of Science:

• Cardiovascular Medicine
• Immunology
• Biomaterials Science

Background:

• Aortic valve stenosis (AS) is a prevalent heart valve disease, with calcific AS affecting 2-7% of individuals aged 65+.
• Aortic valve replacement (AVR) is the standard treatment for symptomatic AS.
• Transcatheter Aortic Valve Replacement (TAVR) offers a minimally invasive option for high-risk patients.

Purpose of the Study:

• To investigate the complex and paradoxical effects of TAVR on the immune system and inflammatory status.
• To explore the mechanisms underlying TAVR-induced inflammation and potential anti-inflammatory effects.
• To highlight the importance of understanding these immune responses for optimizing TAVR outcomes.

Main Methods:

• Review of current literature on TAVR and its impact on immunological and inflammatory pathways.
• Analysis of immune responses regulated by inflammatory monocytes and the complement system.
• Examination of factors contributing to inflammation post-TAVR, including valve disruption and hemodynamic changes.

Main Results:

• TAVR can induce inflammation through disruption of the native valve, hemodynamic shifts, bioprosthesis antigenicity, and vascular damage.
• TAVR may also exert anti-inflammatory effects by resolving stenosis.
• Immune responses involve inflammatory monocytes, complement system activation, and cytokine alterations.

Conclusions:

• The inflammation and immune response following TAVR are intricate and significantly influence procedural success and patient health.
• Further research is needed to fully understand the immunological dynamics of TAVR.
• Developing strategies to modulate these responses is crucial for enhancing healing and minimizing complications after TAVR.