"grade 0: normal chest radiograph, PCWP 8-12 mmHg"
"grade 1: shows evidence of upper lobe diversion on a chest radiograph, PCWP 13-18 mmHg"
"grade 2: shows interstitial oedema on a chest radiograph, PCWP 19-25 mmHg"
"grade 3: shows alveolar oedema on a chest radiograph, PCWP >25 mmHg"
"grade 0: normal chest radiograph, PCWP 8-12 mmHg"
"grade 1: shows evidence of upper lobe diversion on a chest radiograph, PCWP 13-18 mmHg"
"grade 2: shows interstitial oedema on a chest radiograph, PCWP 19-25 mmHg"
"grade 3: shows alveolar oedema on a chest radiograph, PCWP >25 mmHg"