[Hemodynamic changes during pneumonectomy especially changes of right ventricular ejection fraction].

Hemodynamic changes were studied in 14 patients during pneumonectomy using a rapid computerized thermodilution catheter, which is capable of measuring right ventricular ejection fraction (RVEF). Measurements were also performed during perioperative period. Ten minutes after clamping pulmonary artery, RVEF, pulmonary artery resistance index (PVRI) and stroke volume index (SVI) showed an increased right ventricular afterload. The RVEF is a useful and fast responding monitor of right ventricular afterload. It has been suggested that the PVRI may be a reliable safety index to decide the indication of pneumonectomy. We conclude that the right ventricular ejection fraction measured by a rapid computerized thermodilution catheter, can be helpful in hemodynamic monitoring during perioperative period of pneumonectomy.