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Activation of the ergoreceptors in cardiac patients with and without heart failure

Sofie Pardaens1, Marc Vanderheyden2, Patrick Calders3

  • 1Department of Internal Medicine, Ghent University, Ghent, Belgium.

Journal of Cardiac Failure
|August 1, 2014
PubMed

Insights

Ergoreflex activity, linked to breathing changes, is present in unstable heart failure patients and correlates with mortality risk. It is absent in healthy individuals and those with stable heart disease or stable heart failure.

Area of Science:

  • Cardiology
  • Respiratory Physiology
  • Exercise Physiology

Background:

  • The role of ergoreflex activity in hyperventilation and prognosis among cardiac patients remains unclear.
  • Investigating ergoreceptor activity in heart failure and its relation to mortality risk is crucial.

Purpose of the Study:

  • To evaluate ergoreflex activity in cardiac patients with and without heart failure (CHF) and in healthy subjects.
  • To examine the relationship between ergoreceptor activity and the MAGGIC mortality risk score in CHF patients.

Main Methods:

  • Dynamic handgrip exercise followed by post-handgrip regional circulatory occlusion (PH-RCO) was used to measure ergoreflex activity.
  • Participants included healthy subjects, patients with ischemic heart disease (IHD), stable CHF, and unstable CHF.

Main Results:

  • Significant ergoreflex activity was observed in unstable CHF patients (81-92% ventilation contribution), correlating positively with the MAGGIC risk score (ρ=0.431, P=.002).
  • No significant ergoreflex activity was detected in healthy subjects, IHD patients, or stable CHF patients.

Conclusions:

  • Ergoreflex activity contributes to hyperventilation primarily in CHF patients with persistent symptoms and is linked to mortality risk.
  • The absence of ergoreflex activity in IHD and stable CHF suggests alternative mechanisms for increased ventilatory drive in these populations.
Abstract

Keywords:
ErgoreflexMAGGIC risk scorehealthy subjectsheart failureischemic heart diseaseventilation

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