LAUSR

Background The prevalence of cardiac cephalalgia is unknown and there is limited information about its clinical features. We aimed to assess the prevalence of cardiac cephalalgia, its clinical characteristics and associated factors. Methods We conducted a prospective study of patients with suspected acute coronary syndrome admitted to the Cardiology Service at Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain, over a one-year period. We interviewed patients within the first 24 hours of admission using a standardized case-report form to assess the presence of headache in relation to the acute coronary syndrome and its characteristics. Results We included 438 patients, 381 with confirmed myocardial ischemia. Prevalence of cardiac cephalalgia was 14.2% (n = 54). The most common features were frontal location, pressing quality and moderate intensity. Pain referred to the jaws (aOR 2.61; 95% CI 1.33–5.12; p = 0.005), palpitations (aOR 3.65; 95% CI 1.57–8.50; p = 0.003) and circumflex coronary artery as the culprit artery for the myocardial ischemia (aOR 3.8; 95% CI 1.07–13.74; p = 0.021) were related to cardiac whereas history of hypertension was inversely associated (aOR 0.37: 95% CI 0.18–0.74; p = 0.005). Conclusion The prevalence of cardiac cephalalgia was 14.2%. Our study provides valuable information about cardiac cephalalgia characteristics that suggest revision of current diagnostic criteria.