[Hypersensitivity of the carotid sinus in syncope and its diagnostic role: therapeutic implications and follow-up]. / Ipersensibilità del seno carotideo nella sincope e suo ruolo diagnostico: implicazioni terapeutiche e follow-up.

Our aim was to assess the incidence and clinical characteristics of carotid sinus hypersensitivity in a group of subjects suffering from syncope. The total number of patients was 118. Twenty-four of them (20%) were diagnosed as epileptics (first attack) and 38 (32%) as vasodepressors. 56 patients with unexplained syncope underwent carotid sinus massage during electrocardiographic registration and pressure monitoring. 41 patients were found to have carotid sinus hypersensitivity. 34 of these 41 patients received implantation of a pacemaker. Abnormal sinus node function was noted in 30, abnormal atrioventricular node function in 3 and combined abnormal sinus node and AV node function in 1. Furthermore three other patients who were negative to massage were implanted with a pacemaker because they had an organic heart disease and recurrent syncope. Different tests as 24-hour monitoring ecg and electrophysiologic study showed no better results in the diagnosis of syncope. Our data demonstrates the diagnostic importance of carotid sinus massage in the diagnosis of syncope. The validity of this method is confirmed by the 24 month follow-up.