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Late potentials, ventricular stimulation and ventricular tachycardia.
South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
|December 20, 1986
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.
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.
- 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.