Clinical Research Directory

Inclusion Criteria: * Adult patients * Heart failure patients with left ventricular failure with a ventricular ejection fraction less than or equal to 40% evaluated by trans-thoracic echocardiography less than a year ago and specifying in particular the patient's filling pressures at the state stable. * Patients under treatment adapted to the level of heart failure according to the 2021 European Society of Cardiology recommendations. * Scheduled surgery under general anesthesia. * Invasive hemodynamic monitoring planned by the anesthetist-resuscitator (irrespective of potential inclusion in the protocol): arterial catheter and central venous line for measurement of CVP (central venous pressure). * Postoperative monitoring planned in intensive care or intensive care * Presence of controlled mechanical ventilation with tidal volumes between 8 and 10 ml/kg of ideal weight. * Presence of arterial hypotension after induction of general anesthesia, and before surgical stimulation. * Patient affiliated to a social security scheme or equivalent * No opposition from the patient. Exclusion Criteria: * Chronic heart failure patients with right ventricular failure. * Patients presenting signs of acute pulmonary edema, Pulmonary arterial hypertension (PAH), severe valvular disease, intracardiac shunt. * Patients operated on under general anesthesia but maintaining spontaneous ventilation. * Patients with respiratory compliance disorders with compliances greater than 30 cm of water. * Patients with intra-abdominal hypertension. * Patients with supraventricular or ventricular arrhythmia. * Patients treated with catecholamines prior to the procedure. * Patients operated on for urgent surgeries * Patient under guardianship, curatorship or safeguard of justice * Pregnant or breastfeeding women.