C-reactive protein and coronary events following percutaneous coronary angioplasty

Abstract 

Purpose

We investigated the associations between baseline C-reactive protein levels in patients undergoing percutaneous coronary angioplasty and death, nonfatal myocardial infarction, and repeat revascularization during 14 months of follow-up.

Methods

In a single-center, prospective, cohort study, plasma levels of C-reactive protein were measured in 1458 consecutive patients undergoing elective or urgent coronary angioplasty. Patients were followed at 12 to 14 months for the occurrence of death, nonfatal myocardial infarction, and repeat revascularization.

Results

The incidence of death or myocardial infarction was 6.1% (44/716) in patients with an increased C-reactive protein level (>3 mg/L) and 1.5% (11/742) in patients with a normal level (relative risk [RR] = 4.4; 95% confidence interval [CI]: 2.2 to 8.5; P <0.0001). In a multivariate logistic regression model, an increased C-reactive protein level was an independent predictor of death or nonfatal myocardial infarction (RR = 3.6; 95% CI: 1.8 to 7.2; P =0.0001). The incidence of repeat revascularization was similar in patients with or without an increased C-reactive protein level (23% [168/716] vs. 22% [163/742], P = 0.54). Statin therapy at the time of the procedure was associated with a lower mean (± SD) C-reactive protein level (5.8 ± 9.7 mg/L vs. 7.2 ± 12.1 mg/L, P =0.02), but was not associated with the risk of death, nonfatal myocardial infarction, and repeat revascularization during follow-up.

Conclusion

An increased C-reactive protein level is an independent prognostic indicator for the occurrence of death or nonfatal myocardial infarction following coronary angioplasty, but is not associated with the need for repeat revascularization.