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Introduction : The aim of this study was to evaluate prevalence and related findings of coronary to bronchial artery fistula (CBF) on electrocardiogram-gated cardiac CT in patients who had coexistent bronchiectasis.Method : In 3,856 patients who underwent electrocardiogram-gated cardiac CT from April 2009 to November 2012, 207 patients (95 males and 112 females, mean age, 62.1±11.6 years) with bronchiectasis were retrospectively included to assess the prevalence of CBF.Presence or absence of CBF was reviewed and relation to extent of bronchiectasis and bronchial artery engorgement was assessed.