A woman who claims she suffered a stroke after being given medical treatment is taking Guy's and St Thomas's NHS Trust to the High Court. The court will hear that Marie Green, 49, is slowly recovering from the stroke, but is still unable to go out by herself and needs help with cooking and shopping. Green underwent routine surgery on her heart valves at St Thomas's Hospital in March 1997, and was given the anticoagulant Warfarin before being discharged. She continued to take Warfarin and at the beginning of April 1997 suffered a severe stroke which she blames on "over-coagulation". She accuses the NHS Trust of negligence. She alleges that if her anticoagulation levels had been monitored reasonably, her stroke would have been avoided. She is represented in her claim by Field Fisher Waterhouse.