OBJECTIVE: To assess the occurrence of acute coronary syndrome (ACS) in patients with giant cell arteritis (GCA) compared to subjects without GCA. METHODS: We retrospectively reviewed a population-based incidence cohort of Olmsted County, Minnesota residents with GCA diagnosed in 1950-2009. We compared this cohort with a cohort of patients without GCA of similar age, sex, and calendar year from the same population. RESULTS: The study included 245 patients with GCA and 245 non-GCA subjects. The mean ± SD Framingham cardiovascular risk score was 30% ± 19% in GCA patients and 34% ± 23% in non-GCA subjects (P = 0.096) at the incidence/index date. Diabetes mellitus was significantly less common in GCA patients than non-GCA subjects at the index date. The mean high-density lipoprotein was higher and triglycerides were lower, with fewer patients taking lipid-lowering medications in the GCA cohort compared to the non-GCA cohort at the index date. During followup, no difference between the 2 cohorts was noted in the overall rate of ACS events (hazard ratio 0.74, 95% confidence interval 0.44-1.26). Overall thrombosis in myocardial infarction scores were similar in both cohorts. Revascularization procedures were done less frequently in GCA than in non-GCA subjects (19% versus 50%; P = 0.015). Post-ACS hospital length of stays and complications were similar in both cohorts. CONCLUSION: Multiple cardiovascular risk factors are less atherogenic at incidence of GCA. There is no overall increased risk of ACS in patients with GCA.
OBJECTIVE: To assess the occurrence of acute coronary syndrome (ACS) in patients with giant cell arteritis (GCA) compared to subjects without GCA. METHODS: We retrospectively reviewed a population-based incidence cohort of Olmsted County, Minnesota residents with GCA diagnosed in 1950-2009. We compared this cohort with a cohort of patients without GCA of similar age, sex, and calendar year from the same population. RESULTS: The study included 245 patients with GCA and 245 non-GCA subjects. The mean ± SD Framingham cardiovascular risk score was 30% ± 19% in GCA patients and 34% ± 23% in non-GCA subjects (P = 0.096) at the incidence/index date. Diabetes mellitus was significantly less common in GCA patients than non-GCA subjects at the index date. The mean high-density lipoprotein was higher and triglycerides were lower, with fewer patients taking lipid-lowering medications in the GCA cohort compared to the non-GCA cohort at the index date. During followup, no difference between the 2 cohorts was noted in the overall rate of ACS events (hazard ratio 0.74, 95% confidence interval 0.44-1.26). Overall thrombosis in myocardial infarction scores were similar in both cohorts. Revascularization procedures were done less frequently in GCA than in non-GCA subjects (19% versus 50%; P = 0.015). Post-ACS hospital length of stays and complications were similar in both cohorts. CONCLUSION: Multiple cardiovascular risk factors are less atherogenic at incidence of GCA. There is no overall increased risk of ACS in patients with GCA.
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