In the operating room, most intubation procedures (IP) are scheduled and performed on hemodynamically stable patients. In the ICU, IP is frequently performed in emergent patients, because of unstable hemodynamics and/or acute respiratory failure, and complicated by a subsequent cardiovascular collapse. Transthoracic echocardiography (TTE) has become readily available in most ICUs for several years. Echocardiography enables to perform a noninvasive hemodynamic evaluation (cardiac function and volemia status).

We hypothesized that performing a TTE prior to IP may help to predict cardiovascular collapse and its components.

Inclusion Criteria:

Patient requiring endotracheal intubation

Exclusion Criteria:

• Age < 18 yrs
• Pregnancy
• Amputation of a lower limb
• Passing leg raising contraindication: intracranial hypertension with invasive monitoring, fracture of the pelvis or limbs
• Patients under administrative protective measures
• Severe cardiovascular collapse before intubation
• Severe cardiogenic pulmonary oedema

Patient admitted to ICU