The -174G/C interleukin-6 polymorphism influences postoperative interleukin-6 levels and postoperative atrial...

Area of Science:

• Cardiology
• Genetics
• Immunology

Background:

• Inflammation is implicated in post-cardiac surgery atrial arrhythmias.
• A genetic predisposition to postoperative complications is suggested.
• The study investigates the Interleukin-6 (IL-6) -174 G/C gene polymorphism's role in postoperative atrial fibrillation (AF).

Purpose of the Study:

• To determine if the IL-6 -174 G/C gene variant influences the development of AF after coronary artery bypass grafting (CABG).
• To explore the relationship between this genetic variant, systemic inflammation, and AF incidence.

Main Methods:

• Genotyping for the IL-6 -174 G/C polymorphism in 110 CABG patients.
• Measurement of IL-6, fibrinogen, and C-reactive protein pre- and post-surgery.
• Continuous cardiac rhythm monitoring and daily ECGs to detect AF.

Main Results:

• The GG genotype was identified as the sole independent predictor of postoperative AF.
• Postoperative AF occurred in 33.9% of GG genotype patients versus 10.4% of non-GG patients.
• AF patients exhibited higher postoperative IL-6 and fibrinogen levels.

Conclusions:

• The IL-6 -174 G/C gene variant modulates surgical inflammatory responses and impacts AF development.
• These findings support an inflammatory component in postoperative atrial arrhythmias.
• The study suggests a genetic predisposition to developing AF after cardiac surgery.