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Related Experiment Videos

Multisite stimulation in refractory heart failure.

G Ansalone1, P Trambaiolo, G P Giorda

  • 1Department of Heart Diseases, San Filippo Neri Hospital, Rome.

Giornale Italiano Di Cardiologia
|May 18, 1999
PubMed
Summary
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Dual-chamber pacing (DDD) for severe heart failure shows conflicting results. Biventricular pacing may improve function by synchronizing ventricular activation, especially in patients with delayed sequences.

Area of Science:

  • Cardiology
  • Biomedical Engineering

Background:

  • DDD pacing from the right ventricle for severe heart failure yields inconsistent outcomes.
  • Limitations include asynchronous activation, particularly in patients without Left Bundle Branch Block (LBBB).

Purpose of the Study:

  • To evaluate the effectiveness of biventricular pacing in improving ventricular function in severe heart failure patients.
  • To explore the potential of biventricular pacing to synchronize ventricular activation.

Main Methods:

  • Biventricular pacing via transvenous leads through the coronary sinus to stimulate both ventricles.
  • Utilizing cardiac veins to stimulate the right apex and left lateral wall simultaneously.
  • Potential application of tissue Doppler imaging for candidate selection.

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Main Results:

  • Biventricular pacing offers a potential approach to enhance ventricular function through synchronized septum and left ventricular apex activation.
  • This method is particularly relevant for patients with delayed ventricular activation sequences.
  • Right ventricular septal pacing showed no improvement over right apex pacing in certain patient groups.

Conclusions:

  • Biventricular pacing presents a feasible strategy for improving cardiac function in severe heart failure.
  • Further research is warranted to investigate the chronic effects of left ventricular pacing.
  • Tissue Doppler imaging may aid in selecting appropriate candidates for biventricular pacing.