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Related Experiment Videos

Single-lead VDD pacing: long-term experience with four different systems

J L Rey1, C Tribouilloy, F Elghelbazouri

  • 1Cardiology Department, University Hospital, Amiens, France.

American Heart Journal
|June 18, 1998
PubMed
Summary
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Single-lead VDD pacing systems offer effective long-term atrial-triggered ventricular pacing for atrioventricular block. These systems demonstrate excellent atrioventricular synchronization, comparable to dual-lead DDD systems.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Single-lead VDD pacing systems are used for atrioventricular block without sinus dysfunction.
  • Previous studies focused on mid-term results from multicenter trials.
  • Long-term data from a single center using various VDD systems were lacking.

Purpose of the Study:

  • To evaluate the long-term efficacy of different single-lead VDD pacing systems.
  • To assess atrioventricular synchronization in patients with atrioventricular block.
  • To compare the performance of VDD systems with conventional DDD pacing.

Main Methods:

  • A cohort of 150 patients (mean age 76 years) with atrioventricular block or hypertrophic cardiomyopathy received VDD pacing.
  • Four different single-lead VDD systems were implanted.

Related Experiment Videos

  • Atrioventricular synchronization was monitored using ECG and Holter monitoring during follow-up.

    • Main Results:

    • Mean atrial electrogram amplitude was 2.01 mV, with no significant differences between systems.
    • After a mean follow-up of 24 months, 95% of patients remained in VDD mode.
    • 96% of patients with sinus rhythm achieved >90% atrioventricular synchronization, with 94% achieving >95%.

    Conclusions:

    • Single-lead VDD pacing systems provide satisfactory long-term atrioventricular synchronization.
    • Performance is comparable to conventional dual-lead DDD pacing systems.
    • These systems are a viable option for patients requiring ventricular pacing with atrial sensing.