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The authors evaluated the prevalence of right to left shunt in 40 subjects w ith cluster headache (CH) vs 40 subjects without primary headaches or cerebrovas cular disease. The diagnosis of shunt was made by means of transcranial Doppler with contrast medium. A shunt was found in 17 CH patients (42.5%) and in 7 cont rols (17.5%) (p = 0.029; OR = 3.48; 95%CI = 1.13 to 10.69).
The authors evaluated the prevalence of right to left shunt in 40 subjects w ith cluster headache (CH) vs 40 subjects without primary headaches or cerebrovas cular disease. The diagnosis of shunt was made by means of transcranial Doppler with contrast medium. A shunt was found in 17 CH patients (42.5%) and in 7 cont rols (17.5%) (p = 0.029; OR = 3.48; 95% CI = 1.13 to 10.69).