Kawasaki disease in the British Isles was surveyed by an active report
ing scheme, based on all cases reported to the British Paediatric Surv
eillance Unit that were diagnosed between 1 January and 31 December 19
90. The study was prompted by the need to investigate the high case fa
tality rate of Kawasaki disease of 2% observed in 1988. One hundred an
d sixty three patients were identified of whom six (3.7%) died. Forty
five children (28%) suffered cardiac complications of which 39 (24%) w
ere coronary artery abnormalities; five children were diagnosed at pos
tmortem examination, and coronary artery abnormalities were detected b
y echocardiography in 34. One hundred and forty nine children (93%) ha
d echocardiography. High thrombocytosis, leucocytosis, duration of fev
er, and younger age were associated with the presence of coronary arte
ry abnormalities. Erythrocyte sedimentation rate, sex, and the number
of diagnostic criteria were not. One hundred and thirty three children
(87%) received aspirin. Ninety three children (61%) received intraven
ous gammaglobulin (IVGG). Children were more likely to receive IVGG if
they had thrombocytosis or typical Kawasaki disease. The incidence of
coronary artery abnormalities was found to be similar in those treate
d with IVGG (29%) and those untreated (20%), including those treated w
ithin 10 days of onset. This may have reflected selection of the more
serious cases to receive IVGG or that Kawasaki disease in the British
Isles is a different illness to that experienced elsewhere. It may be,
however, that IVGG is less effective in the treatment of British pati
ents with Kawasaki disease than has been the experience in the United
States and Japan. These observations emphasise the need for a therapeu
tic trial of treatment modalities for Kawasaki disease in the UK and t
he Republic of Ireland.