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[Chronotropic incompetence: when should a pacemaker be considered? Which pacing system and which settings?].

X Copie1, G Lascault

  • 1Centre cardiologique du Nord, 32-36, rue des Moulins-Gémeaux, 93207 Saint-Denis, France.

Annales De Cardiologie Et D'Angeiologie
|January 31, 2003
PubMed
Summary

Chronotropic incompetence, the inability to adequately increase heart rate during exercise, causes exertional intolerance. Rate-adaptive pacing systems can effectively manage this condition by detecting sinus node function or utilizing sensors.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Context:

  • Chronotropic incompetence is a condition where the heart rate fails to increase sufficiently during physical activity.
  • This often leads to symptoms of exertional intolerance, significantly impacting quality of life.
  • Existing pacing systems may not adequately address the heart's inability to accelerate.

Purpose:

  • To explore the definition and clinical manifestations of chronotropic incompetence.
  • To review the development and efficacy of rate-modulating pacing systems for managing this condition.
  • To outline the indications for implementing rate-adaptive pacing strategies.

Summary:

  • Chronotropic incompetence is characterized by an inadequate heart rate response during exercise, leading to symptoms like fatigue and shortness of breath.

Related Experiment Videos

  • Rate-adaptive pacing, including sinus node detection and sensors (motion, respiration, QT, contractility), offers solutions.
  • Adding an atrial lead in VVI pacing for complete AV block can improve heart rate response in select patients.

    • Impact:

    • Improved management of exertional intolerance in patients with chronotropic incompetence.
    • Enhanced quality of life through optimized heart rate response during physical activity.
    • Guidance for clinicians on appropriate patient selection and pacing strategies for rate-adaptive systems.