tokens: The administration of ephedrine led to a similar increase in MAP ( 53 + / - 9 to 79 + / - 8 mmHg ; P < 0 . 001 ) , restored CO ( 3 . 2 + / - 1 . 2 to 5 . 0 + / - 1 . 3 l min ( - 1 ) ) , and preserved S ( c ) O ( 2 ) .