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Determining the Optimal Pacing Intervention Rate for Vasovagal Syncope

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Abstract

Introduction: In this study, patients with rate hysteresis pacemakers implanted for vasovagal syncope were re-studied using serial tilt testing to determine whether, once triggered, pacing was more effective if the intervention rate was higher than the standard rate.

Methods and Results: Twenty patients (mean age 55.4 years, range 23–81, 14 male) were studied, with randomisation to either initial standard rate (80–90[emsp4 ]beats/min) intervention, or to initial high rate (120[emsp4 ]beats/min) intervention. Although 18 of the 20 reported complete abolition of syncope since pacing, only 8 patients could be objectively assessed. The respective mean time to tilt down after symptom onset with standard and high rate intervention was 193±234[emsp4 ]s and 185±143[emsp4 ]s, (P

>0.05).

Conclusion: Repeat tilt testing was only of limited value in assessing the benefit of pacing. There was no advantage with high rate intervention in delaying the loss of consciousness (or intolerable symptoms) after the initial onset of symptoms.

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Authors and Affiliations

  1. London Chest Hospital, London, UK

    Arvinder S Kurbaan

  2. Royal Brompton and Chelsea & Westminster Hospitals, London, UK

    Ann-Christine Franzén, Zara Stack, David Heaven, Gita Mathur & Richard Sutton

Authors
  1. Arvinder S Kurbaan
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  2. Ann-Christine Franzén
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  3. Zara Stack
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  4. David Heaven
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  5. Gita Mathur
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  6. Richard Sutton
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Kurbaan, A.S., Franzén, AC., Stack, Z. et al. Determining the Optimal Pacing Intervention Rate for Vasovagal Syncope. J Interv Card Electrophysiol 4, 585–589 (2000). https://doi.org/10.1023/A:1026509430078

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  • DOI: https://doi.org/10.1023/A:1026509430078

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