Abstract
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.