BMJ 2010; 340 doi: https://doi.org/10.1136/bmj.c551 (Published 02 February 2010) Cite this as: BMJ 2010;340:c551

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Do lights at pedestrian crossings give older people enough time to cross safely? After measuring the walking speed of patients attending a geriatric assessment centre, investigators calculated that with current timings many 80 year olds would be unable to make it across a road more than 22 metres wide. Although matching crossing times to the walking speeds of older people may seem unrealistic, in the European Union nearly 40% of pedestrians killed are aged 65 and older (Age and Ageing 2010;39:80-6, doi:10.1093/ageing/afp206).

Neurodevelopmental impairment is common in children with severe congenital heart disease. It tends to be blamed on inadequate cerebral perfusion and brain anoxia that occurred intraoperatively while the cardiac defects were being repaired. Magnetic resonance imaging and spectroscopy, which can be used to measure brain growth in fetal life, suggest that the problem starts much earlier. A North American study found that third trimester fetuses with some forms of congenital heart disease had smaller brain volumes …

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