rtokens: " A worsening in the president 's lung functions took place yesterday , " presidential spokesman Ladlislav Spacek said in a statement .
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tokens: He said that the procedure to insert a device into Havel 's throat , done after his breathing worsened on Thursday , had helped , and the president 's condition significantly improved .
ltokens: Doctors performed an emergency tracheotomy to help Czech President Vaclav Havel breathe after cancer surgery on his lungs earlier this week , a spokesman said on Friday .