Fig. 2From: Severe but not mild hypercapnia affects the outcome in patients with severe cardiogenic pulmonary edema treated by non-invasive ventilationRate of non-rapid favorable outcome, including the need for intubation or continuation of NIV for more than 48 h, according to the level of PaCO2 at admission. A higher proportion of patients with PaCO2 >60 mmHg (indicated by black bars) needed prolonged NIV beyond 48 h, whereas the rate of intubation was similar regardless of PaCO2 value at admissionBack to article page