After a video clip (quickly taken down) showed the Russian president spluttering, rumours of his ill health have circulated – but, writes Mary Dejevsky , tracking his potential demise doesn’t mean that whoever comes next will provide anything different for the rest of the world T he coughing fit that interrupted Vladimir Putin’s efforts to record his International Women’s Day message has revived speculation about the Russian president’s health, even his demise. Periodic disappearances for days