Clinical significance of serum Helicobacter pylori antibody cytotoxin-associated gene A levels in patients with unstable angina.

OBJECTIVES

We investigated the clinical significance of serum Helicobacter pylori cytotoxin-associated gene A (CagA) antibody levels in 768 patients with unstable angina (UA).

METHODS

Serum CagA levels were measured using ELISA. Demographic data, serum biomarkers, and SYNTAX scores were collected. Patients were followed up for 1 year for major adverse cardiac events (MACE).

RESULTS

CagA-positive UA patients had higher total cholesterol and hsCRP levels, and SYNTAX scores. CagA levels correlated positively with TC, hsCRP, and SYNTAX scores. Kaplan-Meier analysis showed shorter MACE-free survival in CagA-positive UA patients. CagA levels predicted MACE occurrence within 1 year, along with SYNTAX scores.

CONCLUSIONS

Serum H. pylori CagA antibody positivity is associated with worse prognosis in UA patients. CagA levels correlate with lipid metabolism and inflammatory markers.