Les bi-tachycardies

Simultaneous tachycardia is not a frequent arrythmia and its diagnosis has been improved by invasive and noninvasive techniques of recording atrial activity. Thanks to 3 cases of simultaneous tachycardia collected over 10 years of activity and, a review of the litterature on the subject the authors try to emphasize the main characteristics of this arrythmia. Simultaneous tachycardia has major electrocardiographic polymorphism, nevertheless the typical ECG feature is irregular tachycardia with wide QRS and frequent modifications of the QRS morphology. The prognosis of this arrythmia seems to be enhancing and, amiodarone is a very effective drug in this case