[Concealed permanent ventricular reentry and paroxysmal ventricular tachycardia by circulatory movement]

Endocavitary recording in a patient with attacks of ventricular tachycardia demonstrated a late potential which activated the bundle of His in a retrograde fashion, and the right bundle branch in a forwards direction. This late potential is evidence of a persistant ventricular microeentry which cannot be seen on the peripheral leads. In certain conditions which have been studied, this localised microreentry leads to ventricular tachycardia by macroreentry using the branches of the bundle of His. Tanks to this unusual case, we were able to study the effects of certain anti-arrhythmic drugs on the micro- and macroreentry circuits. By these means a therapeutic solution has been found for paroxysms of ventricular tachycardia.