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Table 2 contains comparative statistics regarding preoperative risk factors.
The first technology assessment addressed preoperative testing in elective surgery.
Preoperative radiography demonstrated a left-sided heart and descending aorta.
Preoperative angiograms were unavailable for 5 patients, and postoperative films were unavailable for an additional 2 patients.
Repeated catheterization for preoperative evaluation at nine years of age showed essentially similar findings.
The rule ofclosure may be broken when there is no preoperative regurgitation and the edges of the adjacent leaflets are very thin.
Both reports (5;7) considered that the indications for preoperative investigation might have a large economic impact on health care.
In retrospect, however, the anatomy could be distinguished on preoperative echocardiograms.
Preoperative investigation showed a hemoglobin of 19.2 g/dl and relatively normal pulmonary vasculature on her chest x-ray.
Mitral regurgitation was graded for each patient by preoperative echocardiography-none (12), mild to moderate (29) or severe (5) mitral valve regurgitation.
Preoperative right pulmonary venogram showing anomalous right pulmonary venous connection to the right-sided atrium.
The cardiothoracic ratio was measured at the level of the maximum cardiac dimension from the posterior-anterior projection of preoperative and postoperative chest radiographs.
The mean scores were not significantly associated with sociodemographic characteristics, preoperative acidosis, hypoxemia or "sickness," age at testing or any other patient-related variable.
All had lowered pulmonary vascular resistance or systolic pulmonary artery pressure compared to preoperative values.
With careful preoperative planning on the basis of accurate diagnosis we did not find it to be so.
