title: Echocardiographic evaluation of pulmonary hypertension by oxygen inhalation method.
abstract: The ratio of the right ventricular preejection period to the right ventricular ejection time was calculated from the echocardiogram of the pulmonic valve before and after inhalation of a high concentration of oxygen in pulmonary hypertensive patients. The results showed that this non-invasive method could differentiate pulmonary vascular disease from non-pulmonary vascular disease and hence useful for evaluating the change of the pulmonary vascular bed in the pulmonary hypertensive patients.
mesh_terms: D004452:Echocardiography; D006801:Humans; D006976:Hypertension, Pulmonary / Q000503:physiopathology*; D010100:Oxygen
chemical_list: D010100:Oxygen