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Related Experiment Videos

Thresholds for transesophageal atrial pacing.

M Dick, R M Campbell, J M Jenkins

    Catheterization and Cardiovascular Diagnosis
    |January 1, 1984
    PubMed
    Summary

    Transesophageal atrial capture is achievable with minimal current and pulse width, unaffected by patient age or size. This study determined effective thresholds for pacing the atria using transesophageal bipolar leads.

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    Area of Science:

    • Cardiology
    • Electrophysiology
    • Pediatric Cardiology

    Background:

    • Transesophageal atrial pacing is a critical tool for managing supraventricular tachycardias.
    • Understanding capture thresholds is essential for safe and effective pacing.
    • Previous studies have not comprehensively evaluated factors influencing these thresholds in pediatric populations.

    Purpose of the Study:

    • To determine the minimal current and pulse width for transesophageal atrial capture.
    • To identify factors, including age and size, that may influence these capture thresholds.
    • To assess the feasibility of transesophageal atrial pacing in pediatric patients.

    Main Methods:

    • Investigated 12 patients (1 day to 19 years) during 19 episodes of reentrant supraventricular tachycardia.
    • Utilized transesophageal bipolar lead systems with varying electrode catheters based on patient size.
    • Systematically increased pulse width and current to determine minimal capture thresholds.

    Main Results:

    • Mean minimal pulse width and current for capture were 5.8 msec and 13.6 mamp.
    • Atrial capture was achieved in 75% of attempts at thresholds ≤ 6.5 msec and 17.5 mamp.
    • No correlation found between capture thresholds and patient age, height, weight, body surface area, electrode type, or structural heart disease.

    Conclusions:

    • Transesophageal atrial capture is readily achievable using bipolar lead systems.
    • Capture thresholds are not significantly influenced by patient age or physical size.
    • Transesophageal pacing offers a viable option for atrial management in diverse pediatric age groups.

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