With careful preoperative planning on the basis of accurate diagnosis we did not find it to be so.
All had lowered pulmonary vascular resistance or systolic pulmonary artery pressure compared to preoperative values.
The mean scores were not significantly associated with sociodemographic characteristics, preoperative acidosis, hypoxemia or "sickness," age at testing or any other patient-related variable.
The cardiothoracic ratio was measured at the level of the maximum cardiac dimension from the posterior-anterior projection of preoperative and postoperative chest radiographs.
Preoperative right pulmonary venogram showing anomalous right pulmonary venous connection to the right-sided atrium.
Mitral regurgitation was graded for each patient by preoperative echocardiography-none (12), mild to moderate (29) or severe (5) mitral valve regurgitation.
Preoperative investigation showed a hemoglobin of 19.2 g/dl and relatively normal pulmonary vasculature on her chest x-ray.
In retrospect, however, the anatomy could be distinguished on preoperative echocardiograms.
