The goal of this observational study is to learn about the performance of a new index for hypotension prediction during the immediate postoperative period of cardiac surgery patients in the intensive care unit. The main questions it aims to answer are: 1. Is this new index, Hypotension Prediction Index, able to predict hypotension during the immediate postoperative period in cardiac surgery patients in the intensive care unit? 2. How frequent hypotension is during the immediate postoperative period of cardiac surgery patients in the intensive care unit? Participants will not receive any treatment beyond the usual clinical practice during the study. All patients will have an invasive arterial line that is part of the usual clinical practice. This arterial line is connected to a pressure transducer for continuous measurement of arterial pressure. A transducer equipped with the necessary technology to calculate the hypotension prediction index will be used instead of the usual transducer. An echocardiogram will be performed in every patient in the study. This test is done frequently in patients after a cardiac surgery.
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HPI Performance on Hypotension Prediction
Timeframe: First 12 hours of the cardiac surgery postoperative period