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Ventricular monophasic action potentials during intermittent left bundle branch block.

C Luca

    Medecine Interne
    |January 1, 1978
    PubMed
    Summary
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    This case study shows how simultaneous recording of ventricular action potentials and His bundle electrograms accurately demonstrate delayed left ventricular activation in intermittent left bundle branch block, aiding complex electrophysiologic investigations.

    Area of Science:

    • Cardiology
    • Electrophysiology

    Background:

    • Intermittent left bundle branch block (LBBB) presents diagnostic challenges.
    • Accurate assessment of ventricular activation is crucial for understanding LBBB.

    Purpose of the Study:

    • To present a case of intermittent left bundle branch block.
    • To demonstrate the utility of specific electrophysiologic recording techniques in diagnosing LBBB.

    Main Methods:

    • Simultaneous recording of right and left ventricular monophasic action potentials.
    • His bundle electrogram recording.

    Main Results:

    • Delayed left ventricular activation was accurately demonstrated during intermittent LBBB.
    • His bundle electrogram facilitated interpretation of infrahisian conduction.

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    Conclusions:

    • Combined ventricular monophasic action potentials and His bundle electrograms are valuable tools.
    • These methods aid in complex electrophysiologic investigations of intermittent LBBB.