Distinct Cytokine Patterns Identify Acute and Convalescent Myocardial Involvement After Coronavirus Disease 2019: A...

Area of Science:

• Immunology
• Cardiology
• Infectious Diseases

Background:

• Coronavirus disease 2019 (COVID-19) can lead to cardiac involvement, a significant post-acute sequela.
• The specific immunobiologic mechanisms driving cardiac issues in acute versus convalescent COVID-19 are not fully understood.

Purpose of the Study:

• To investigate the distinct immunobiologic underpinnings of cardiac involvement in acute and convalescent phases of COVID-19.
• To compare inflammatory profiles and cardiac status between acute and post-COVID-19 populations.

Main Methods:

• Integrated analysis of cytokine levels (Tumor Necrosis Factor alpha [TNF-α] and Interleukin-18 [IL-18]).
• Cardiac magnetic resonance imaging (CMR) to assess myocardial inflammation and edema.
• Cardiopulmonary exercise capacity testing.

Main Results:

• Acute cardiac injury was associated with elevated TNF-α but not IL-18.
• Convalescent myocardial inflammation/edema correlated with IL-18 levels, independent of TNF-α.
• Distinct inflammatory profiles were observed between acute and convalescent cardiac involvement.

Conclusions:

• Inflammation is not a uniform process in COVID-19-related cardiac involvement.
• Post-acute cardiac sequelae may arise from mechanisms differing from acute cardiac injury.
• Targeted therapies addressing specific inflammatory pathways (e.g., IL-18) may be crucial for preventing long COVID cardiac complications.