Letters Subarachnoid haemorrhage

Author’s reply

BMJ 2010; 341 doi: http://dx.doi.org/10.1136/bmj.c7421 (Published 30 December 2010) Cite this as: BMJ 2010;341:c7421
  1. Jeffrey J Perry, associate professor1
  1. 1Department of Emergency Medicine, University of Ottawa and Ottawa Hospital Research Institute, Ottawa, Ontario, Canada K1Y 4E9
  1. jperry{at}ohri.ca

Marcus and colleagues are concerned about the time from onset to peak headache.1 Although most patients with subarachnoid haemorrhage have a rapidly peaking headache, we showed that this is not uniformly true. We therefore opted for a longer time to peak intensity criterion to catch more slowly peaking cases of subarachnoid haemorrhage. We found 14 patients with subarachnoid haemorrhage with onset to peak headache greater than 5 minutes (in 11 cases greater than 15 minutes and in one case 1 hour). Hence, we believe our onset time was appropriate. Our …

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