Echocardiographic Measurement of Myocardial Work

Patients will receive fluid administration (500 mL of saline over 30 minutes). The indication of fluid administration will be left to the discretion of the attending physician.

Patients will receive norepinephrine or norepinephrine dosage will be increased if necessary to achieve the appropriate mean arterial pressure level. The indication of norepinephrine administration or increase in norepinephrine dosage will be left to the discretion of the attending physician.