echocardiography: pulmonary artery to aortic index % of predicted at end of expiration
echocardiography: pulmonary artery to aortic index % of predicted at end of expiration
echocardiography: pulmonary artery to aortic index % of predicted at end of expiration
echocardiography: pulmonary artery to aortic index % of predicted at end of expiration