[Auricular vulnerability: what information can be obtained from the study of auricular vulnerability? How to perform this study?].

The factors involved in atrial vulnerability are the presence of intra-atrial conduction disorders and abnormalities of refractory periods which are short, dispersed and poorly adapted to heart rate. All these factors are arrthythmogenic. The main value of the study of atrial vulnerability consists of investigation of unexplained ischaemic cerebrovascular accidents in young subjects. In practice, atrial vulnerability can be measured in the context of a classical endocavitary electrophysiological investigation. The stimulation and recording parameters must be standardized. Latent atrial vulnerability can be considered to be present when at least one of the following elements are found: significant inducibility, very short and poorly adapted effective refractory periods, decreased latent atrial vulnerability index.