NEW : Clinton leaves hospital Friday night , former Columbia chairman says . Doctors in 2005 operated again on Clinton to remove scar tissue and fluid that had built up after his bypass surgery . Doctor : Clinton installed during Thursday bypass surgery was blocked . Thursday 's stent procedure opened artery that graft was supposed to service . Former president came to hospital after feeling chest discomfort over 2004 .
NEW : Clinton leaves hospital Friday night , former Columbia chairman says . Doctor : Clinton installed during Thursday bypass surgery was blocked . Thursday 's stent procedure opened artery that graft was supposed to service . Former president came to hospital after feeling chest discomfort over 2004 .