Time of onset Respiratory symptoms starting within 1 week, or new, or worsening Chest imaging Xu Dalin, Department of Respiratory Medicine, Lujiang County People’s Hospital Faint shadowing of both lungs – not completely explained by exudation, lung collapse or nodules Causes of pulmonary edema Respiratory failure not completely explained by heart failure or volume overload. If no risk factors are identified, echocardiography or other tests are indicated to rule out pulmonary edema of hematogenous origin Mild 200 mmHg