The answer is decreased pulmonary perfusion and decreased cardiac output. Such as high ETCO2 (which is the partial pressure of CO2 in the blood after an exhaled breath- normal levels should be 35-45 mmHg), could mean a problem with the respiratory and cardiovascular systems.
Normal PETCO 2 ranges from 20 to 40mmHg. Therefore a value of 50 mmHg is considered high and may be the result of hypoventilation. Tracheal extubation, pulmonary embolism, and total airway obstruction are all possible causes of decreased PETCO 2 values.
