Carotid stenosis is frequent in patients with coronary artery disease (CAD). In the literature, 9-28% of patients with CAD have additional carotid artery stenosis, predictors of which are advanced age, smoking, diabetes mellitus, arterial hypertension, coronary multivessel disease, and peripheral arterial disease. Moreover, patients with unstable coronary syndromes and those with elevated inflammatory markers such as C-reactive protein or fibrinogen more often have concomitant CAD and carotid artery stenosis. The long-term prognosis of these patients is worse than with CAD only. Therefore, patients with CAD should be screened for additional carotid artery stenosis, especially if coronary artery bypass grafting is planned. Continuous wave Doppler sonography and color-coded duplex sonography are suitable methods to screen for carotid artery stenosis.