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Contribution of central sensitisation to the development of non-cardiac chest pain

, : Contribution of central sensitisation to the development of non-cardiac chest pain. Lancet 356(9236): 1154-1159

Background Non-cardiac chest pain mimics angina pectoris but generally originates from the oesophagus. Visceral hypersensitivity may contribute, but its neurophysiological basis is unclear. We investigated whether central sensitisation, an activity-dependent amplification of sensory transfer in the central nervous system, underlies visceral pain hypersensitivity and non-cardiac chest pain. Methods We studied 19 healthy volunteers and seven patients with non-cardiac chest pain. Acid was infused into the lower oesophagus. Sensory responses to electrical stimulation were monitored within the acid-exposed lower oesophagus, the non-exposed upper oesophagus, and the cutaneous area of pain referral, before and after the infusion. Findings In healthy volunteers, acid infusion into the lower oesophagus lowered the pain threshold in the upper oesophagus (mean decrease 18.2% (95% CI 10.4 to 26.0); p=0.01) and on the chest wall (24.5% (10.2 to 38.7); p=0.01). Patients with non-cardiac chest pain had a lower resting oesophageal pain threshold than healthy controls (45 (30 to 58) vs 64 (49 to 81) mA; p=0.04). In response to acid infusion, their pain threshold in the upper oesophagus fell further and for longer (mean fall in area under threshold/time curve 26.7 (11.0 to 42.3) vs 5.8 (2.8 to 8.8) units; p=0.04). Interpretation The finding of secondary viscerovisceral and viscerosomatic pain hypersensitivity suggests that central sensitisation may contribute to visceral pain disorders. The prolonged visceral pain hypersensitivity in patients with non-cardiac chest pain suggests a central enhancement of sensory transfer. New therapeutic opportunities are therefore possible.


PMID: 11030295

DOI: 10.1016/S0140-6736(00)02758-6

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