Treatment of Helicobacter pylori and Chlamydia pneumoniae infections decreases fibrinogen plasma level in patients with ischemic heart disease

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Abstract

Background - Chronic Chlamydia pneumoniae and Helicobacter pylori infections could be a risk factor for ischemic heart disease (IHD), possibly by increasing fibrinogen levels. The aim of our study was to evaluate changes in fibrinogen level in patients with IHD and H pylori and/or C pneumoniae positivity randomly assigned to antibiotic treatment. Methods and Results - Eighty-four patients with chronic IHD, H pylori and/or C pneumoniae antibodies, and normal acute-phase reactants were randomly assigned to treatment or no treatment. Treatment consisted of omeprazole, clarithromycin, and tinidazole in H pylori-positive patients and clarithromycin alone in C pneumoniae-positive patients. The effect of treatment and other baseline variables on fibrinogen levels, determined at 6 months, was evaluated by multivariate analysis. Treatment significantly reduced fibrinogen level at 6 months in the overall study population and in the groups of patients divided according to H pylori or C pneumoniae positivity. In the 43 treated patients, mean (±SD) basal fibrinogen was 3.65±0.58 g/L, and mean final fibrinogen was 3.09±0.52 g/dL (P<0.001), whereas in the 41 untreated patients, mean basal and final fibrinogen levels were 3.45±0.70 and 3.61±0.71 g/L, respectively. The largest decrease was observed in patients with both infections. Fibrinogen changes were also significantly and negatively correlated with age. Conclusions - Our data suggest that a short, safe, and effective course of antibiotic therapy might be suggested as a means of interacting with an 'emerging' risk factor.

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Torgano, G., Cosentini, R., Mandelli, C., Perondi, R., Blasi, F., Bertinieri, G., … Ranzi, M. L. (1999). Treatment of Helicobacter pylori and Chlamydia pneumoniae infections decreases fibrinogen plasma level in patients with ischemic heart disease. Circulation, 99(12), 1555–1559. https://doi.org/10.1161/01.CIR.99.12.1555

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