• Arch Mal Coeur Vaiss · Aug 1977

    Case Reports

    [Left bundle of His branch block in stages 3 and 4 with conduction in the right branch only in a super-normal period].

    • G Motté, P Desoutter, C Fournial, and J J Wilti.
    • Arch Mal Coeur Vaiss. 1977 Aug 1; 70 (8): 789-95.

    AbstractThe authors report a case of chronic second degree atrio-ventricular block with permanent right bundle branch block. Intracavitary electrophysiological recordings allowed them to delimit the refractory period of the left branch, which was affected by a block during phase 3 but also during phase 4. They showed that there was possible conduction by the right branch during the extremely fine time limits of a supernormal period; using an atrial stimulation rate of 150/mn, it is therefore possible to obtain 1/1 conduction in the presence of a left bundle branch block.

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