Lack of agreement between thermodilution and electrical velocimetry cardiac output measurements.

Objective The modified algorithm for the non-invasive determination of cardiac output (CO) by electrical bioimpedance—electrical velocimetry (EV®)—has been reported to give reliable results in comparison with echocardiography and pulmonary arterial thermodilution (PA-TD) in patients either before or after cardiac surgery. The present study was designed to determine whether EV®-CO measurements reflect intraindividual changes in CO during cardiac surgery.