The aim of our study was to evaluate the reliability of uncalibrated cardiac index monitoring based on arterial waveform analysis in patients undergoing off-pump coronary artery bypass grafting.

Using contemporary statistical method the cardiac index values obtained via uncalibrated pulse contour analysis with Pro AQT system will be compared with traditional transpulmonary thermodilution technique (Pulsion, Germany).

Inclusion Criteria:

• elective off-pump coronary artery bypass grafting

Exclusion Criteria:

• age < 18 and > 80 years,
• preoperative ejection fraction < 0.35,
• severe cardiac valve dysfunction or peripheral vascular disease,
• constant atrial fibrillation,
• simultaneous interventions (carotid endarterectomy, aneurysm repair, etc.),
• transfer to cardiopulmonary bypass.

Patients with coronary artery disease, ranked ASA II-III and scheduled for elective off-pump coronary artery bypass grafting