Shin B, Maler SA, Reddy K, et al. - Edwards Lifesciences (Irvine, CA) developed the hypotension prediction index (HPI), a novel parameter, that is obtained through an algorithm based on arterial pressure waveform characteristics. Researchers here investigated its utility in cardiac surgeries requiring cardiopulmonary bypass (CPB). In this prospective cohort feasibility study, sequential adult patients undergoing elective cardiac surgeries requiring CPB were included. Connection of HPI monitor to the patient's arterial pressure transducer was made. Documentation of HPI values and hypotensive events was done before and after CPB. Findings support the utility of HPI for predicting hypotensive episodes during cardiac surgeries with a high degree of sensitivity and specificity. Occurrence of intraoperative hypotension was reported nearly every 33 minutes during cardiac surgery. There appeared no effect on the accuracy of HPI after cardiopulmonary bypass