[A new multipolar transesophageal electrode for assessment of activation sequence in the left atrium].

A new multipolar transoesophageal electrode is described. Two patients were analysed. One with recurrent coronary sinus rhythm and the other with concealed WPW syndrome. Obtained recordings showed difference of sequence of left atrial depolarisation during recovery of the sinus rhythm after its overdrive suppression and during provoked tachycardia. Results are very promising and require further investigation.