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  • Title: Herpes zoster infection associated with acute coronary syndrome: a population-based retrospective cohort study.
    Author: Wang CC, Lin CL, Chang YJ, Wang GJ, Sung FC, Kao CH.
    Journal: Br J Dermatol; 2014 May; 170(5):1122-9. PubMed ID: 24354564.
    Abstract:
    BACKGROUND: Vasculopathy in varicella zoster virus (VZV) infection and a proposed association between herpes virus infection and atherosclerosis suggest a possible link between VZV infection and vascular thrombosis. OBJECTIVES: To determine the risk of acute coronary syndrome (ACS) associated with herpes zoster infection. METHODS: We used the Taiwan National Health Insurance Research Database to identify 57,958 patients newly diagnosed with herpes zoster between 1999 and 2010; 231,832 patients without herpes zoster were examined as the control group. Both cohorts were followed up until the end of 2010 to measure the incidence of ACS. Cox proportional-hazards regression and Kaplan-Meier analyses were used to measure the hazard ratios (HR) and the cumulative incidences of ACS, respectively. RESULTS: The incidence of ACS was 1·24-fold higher in the herpes zoster group than in the control group [36·8 vs. 29·6 per 10,000 person-years, 95% confidence interval (CI) 1·16-1·33]. After adjusting for age, sex and comorbidities, the HR of ACS for the herpes zoster group compared with the control group was 1·15 (95% CI 1·07-1·24). Analysis by the time lag (≤ 3 months, ≤ 1 year, > 1 year) showed that the incidence of ACS remained significantly higher in the herpes zoster group than in the control group, with an adjusted HR of 1·10 (95% CI 1·02-1·19) after the 1-year follow-up period. The Kaplan-Meier survival curve showed that the risk of ACS was significantly higher in the herpes zoster group than in the control group (P < 0·001). CONCLUSION: Herpes zoster infection is associated with an increased risk of ACS.
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