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Related Experiment Videos

[Secondary pauses in sinus node dysfunction].

W Lintner, V Agostini, W Oberlechner

    Acta Medica Austriaca
    |January 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    Secondary pauses (SP) after atrial pacing are a key indicator of sinus node dysfunction (SND). Searching for SP can reveal hidden SND, reducing false negatives in diagnostic tests.

    Area of Science:

    • Electrophysiology
    • Cardiology

    Context:

    • Evaluating secondary pauses (SP) after high-rate atrial pacing.
    • Assessing the significance of SP in patients with and without sinus node dysfunction (SND).

    Purpose:

    • To determine the frequency and diagnostic importance of SP following atrial pacing.
    • To investigate the relationship between SP and various manifestations of SND.

    Summary:

    • Secondary pauses (SP) were observed in 51% of patients with SND versus 4% without, indicating a strong association (p<0.01).
    • SP were most frequent in SA-block/sinus pauses (64%) and bradycardia-tachycardia syndrome (60%).
    • SP may be the sole indicator of SND in some cases, improving diagnostic accuracy after rapid atrial pacing.

    Impact:

    Related Experiment Videos

    • SP can serve as a crucial, sometimes sole, indicator of sinus node dysfunction (SND).
    • Identifying SP may decrease false-negative results in electrophysiological testing for SND.
    • The findings suggest a potential role for vagal mechanisms in the occurrence of SP.