International Circulation: Is that extra hydration， or just assuring not-dehydration?
国际循环：是额外输入生理盐水，或只是保证不脱水吗？

Prof. Roxana Mehran: I think its over-hydration. In patients with good left ventricular  function， we recommend hydrating them up to 12 hours before exposure to contrast media， especially those at high risk for acute kidney injury. 
Prof. Roxana Mehran: 我认为是额外输入。对于左心室功能良好的患者，我们建议在暴露于造影剂12小时之前额外输入生理盐水。