Is central nervous system processing altered in patients with heart failure?

Stuart D. Rosen, Kevin Murphy, Alexander P. Leff, Vincent Cunningham, Richard J S Wise, Lewis Adams, Andrew J S Coats, Paolo G. Camici

Research output: Contribution to journalArticlepeer-review

Abstract

Aims Breathlessness is a cardinal symptom of heart failure and the altered regulation of breathing is common. The contribution of abnormal central nervous system activity has not previously been investigated directly, although abnormal autonomic responses have been described. Our aim was to assess whether heart failure patients exhibit different patterns of regional brain activation after exercise stress. Methods We used positron emission tomography with H 215O, to measure changes in regional cerebral blood flow (rCBF) and absolute global cerebral blood flow (gCBF) in 6 male class II/III heart failure patients and 6 normal controls. Breathlessness (0-5 visual analogue scale) and respiratory parameters were measured at rest, after horizontal bicycle exercise and during isocapnic hyperventilation. CBF was measured in each condition in all subjects. Results Both groups were similarly breathless after exercise and the respiratory parameters were comparable. rCBF differences for the main comparison (exercise vs hyperventilation) were: activation of the right frontal medial gyrus (P

Original languageEnglish
Pages (from-to)952-962
Number of pages11
JournalEuropean Heart Journal
Volume25
Issue number11
DOIs
Publication statusPublished - Jun 2004

Keywords

  • Autonomic nervous system
  • Brain
  • Breathlessness
  • Cerebral blood flow
  • Exercise
  • Heart failure
  • Positron emission tomography

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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