The investigators aim to evaluate the utility of portal vein pulsatility as a predictor of the composite outcome of persistent organ dysfunction plus death in patients undergoing elective or urgent pulmonary endarterectomy for thromboembolic pulmonary hypertension. The investigators' hypothesis is that the portal vein pulsatility fraction, measured using transesophageal echocardiography immediately after weaning of cardiopulmonary bypass, is proportional to the risk of developing subsequent end-organ dysfunction in the postoperative setting.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Persistent organ dysfunction plus death (POD + death) 7 days after surgery
Timeframe: On the morning of the 7th postoperative day