Cardiac output determination from endotracheally measured impedance cardiography: clinical evaluation of endotracheal cardiac output monitor.

Objectives: To evaluate the accuracy, precision, and trending of a new endotracheally sourced impedance cardiography-based cardiac output (CO) monitor (ECOM; ConMed Corp, Irvine, CA).

Setting: Two university hospitals.

Participants: Thirty patients scheduled for elective coronary artery bypass graft (CABG) surgery.