Stress is to blame for a spike in the number of strokes after the Christchurch terror attacks, a study has found.
New research, led by Canterbury District Health Board neurologist Dr Teddy Wu in collaboration with the New Zealand Brain Research Institute, shows there were four times as many acute strokes in the city the week after the mosque attacks and more than four times the number of large strokes.
Dr Wu said the surge in stroke hospitalisations was only found in Christchurch.
He said it is likely stress around the attacks increased the risk of blood clotting leading to more strokes.