( @ ) Hemodynamic parameters : in control group , arterial partial pressure of oxygen , oxygen saturation and left ventricular ejection fraction , pulmonary systolic pression were ( @ @ ) % to ( @ @ ) % , ( @ @ ) to ( @ @ ) mmHg ( @ mmHg = @ kPa ) , @ @ to @ @ and ( @ @ ) to ( @ @ ) mmHg before and after treatment , which showed remarkable decreased trends ( P < @ ) .