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Central nervous pathways mediating angina pectoris

S D Rosen1, E Paulesu, C D Frith

  • 1Cyclotron Unit, MRC Clinical Sciences Centre, Hammersmith Hospital, London, UK.

Lancet (London, England)
|July 16, 1994
PubMed
Summary
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Researchers identified brain regions involved in angina pectoris pain perception using positron emission tomography. Angina activated specific brain areas like the hypothalamus and thalamus, suggesting these pathways are crucial for experiencing chest pain.

Area of Science:

  • Neuroscience
  • Cardiology
  • Medical Imaging

Background:

  • The central nervous system pathways responsible for angina pectoris pain have not been previously identified in humans.
  • Understanding these pathways is crucial for diagnosing and treating visceral pain conditions.

Purpose of the Study:

  • To identify the central nervous system regions involved in the perception of angina pectoris pain.
  • To investigate changes in regional cerebral blood flow (rCBF) during angina using positron emission tomography (PET).

Main Methods:

  • Positron emission tomography (PET) with oxygen-15 labeled water was employed to measure rCBF.
  • 12 patients with coronary artery disease experienced angina induced by dobutamine infusion.
  • rCBF was compared between resting state and induced angina.

Related Experiment Videos

Main Results:

  • Angina was associated with increased rCBF in the hypothalamus, periaqueductal gray, thalamus, lateral prefrontal cortex, and anterior cingulate cortex.
  • Conversely, rCBF decreased in the mid-rostrocaudal cingulate cortex, fusiform gyrus, posterior cingulate cortex, and parietal cortices.
  • Thalamic activation persisted briefly after angina resolution, while cortical activation subsided.

Conclusions:

  • The study proposes that activated central structures, particularly the thalamus and prefrontal cortex, constitute the neural pathways for anginal pain perception.
  • The thalamus may function as a gate for pain signals, with cortical involvement necessary for the conscious sensation of pain.
  • This PET imaging approach can be valuable for studying visceral pain perception disorders, including silent myocardial ischemia.