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Related Experiment Videos

Late potentials, ventricular stimulation and ventricular tachycardia.

B Haitas, J C Deseta, I W Obel

    South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
    |December 20, 1986
    PubMed
    Summary

    Late potentials, indicating delayed ventricular activation, are a key marker for recurrent sustained ventricular tachycardia (RSVT). Their presence correlates with inducible VT, suggesting a re-entrant mechanism.

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    Area of Science:

    • Cardiology
    • Electrophysiology
    • Medical Diagnostics

    Background:

    • Late potentials signify delayed ventricular activation.
    • They are associated with an increased risk of ventricular tachycardia (VT).

    Purpose of the Study:

    • To assess the diagnostic value of late potentials in identifying patients at risk for ventricular tachycardia.
    • To determine the correlation between late potentials and inducible VT in symptomatic patients.

    Main Methods:

    • Non-invasive measurement of late potentials in 64 subjects.
    • Programmed ventricular stimulation in a subgroup of 28 symptomatic patients.

    Main Results:

    • Late potentials were detected in 17/20 patients with recurrent sustained VT (RSVT) and 2/10 with unsustained VT.

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  • No late potentials were found in normal subjects or patients without VT.
  • Late potentials correlated significantly with inducible sustained VT (P < 0.05).

    • Conclusions:

    • Late potentials are a valuable non-invasive marker for identifying RSVT.
    • The presence of late potentials supports a re-entrant mechanism in VT.