In this double-blind study from October @ , @ to April @ , @ , @ patients undergoing CABG with CPB were randomized at four centres to receive intravenous infusions of clevidipine ( @-@gkg ( -@ ) min ( -@ ) ) or NTG ( @ gkg ( -@ ) min ( -@ ) to a clinician-determined maximum dose rate ) from induction of anesthesia through @hr postoperatively .