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Related Experiment Videos

Biventricular pacing: it isn't always as it seems.

Peter M Kistler1, Harry G Mond, Susan J M Corcoran

  • 1Department of Cardiology, The Royal Melbourne Hospital, Victoria, Australia.

Pacing and Clinical Electrophysiology : PACE
|November 19, 2003
PubMed
Summary

Cardiac resynchronization therapy (CRT) helps heart failure patients, but left ventricular lead placement is difficult. This case report shows apparent biventricular pacing was actually dual-site right ventricular pacing, identified by surface ECG.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Device Technology

Background:

  • Cardiac resynchronization therapy (CRT) improves outcomes in symptomatic heart failure.
  • Left ventricular (LV) lead placement for CRT is technically challenging and associated with complications.
  • Accurate lead placement is crucial for effective biventricular pacing.

Observation:

  • A case involving a patient undergoing apparent biventricular pacing via the great cardiac vein.
  • The pacing configuration initially suggested successful LV lead deployment.
  • Surface electrocardiogram (ECG) analysis was key to re-evaluating the pacing site.

Findings:

  • The surface ECG revealed that the pacing was not originating from the left ventricle.
  • The observed pacing pattern was consistent with dual-site right ventricular (RV) pacing.

Related Experiment Videos

  • This misinterpretation highlights potential diagnostic challenges in CRT.

    • Implications:

    • Surface ECG interpretation is critical for verifying lead function and placement in CRT.
    • Misinterpretation of pacing sites can lead to suboptimal therapy and patient management.
    • This case underscores the need for careful ECG analysis to ensure appropriate biventricular pacing.