Chest wall tenderness is unhelpful in the diagnosis of recurrent chest pain.

We investigated whether the presence of chest wall tenderness or fibromyalgia helped to distinguish between ischaemic and non-ischaemic chest pain. Seventy-one patients with recurrent chest pain, 36 with normal (group A) and 35 with abnormal coronary angiograms (group B), were assessed by investigator-administered questionnaires, and were examined for chest wall tenderness and fibromyalgia by a single blinded observer. Chest wall tenderness was greater in group A. However, it was much greater in women, who predominated in group A, than in men, who predominated in group B, and this explained the intergroup difference. Seven patients (25%) (six female, one male) in the group A and one patient (3%) (male) in group B (chi(2) p=0.027) fulfilled criteria for fibromyalgia. Patients with recurrent chest pain are more likely to have a ischaemic cause if they are male. Although our study suggests that chest wall tenderness alone in patients with recurrent chest pain has no value in excluding myocardial ischaemia as a cause, the confounding factor of gender prevents our study design from answering this question conclusively. Fibromyalgia is commoner in patients with chest pain and normal coronary angiograms, but may be related to the excess of females in this group. Its presence does not preclude the co-existence of ischaemic heart disease.