A 55-Year-Old Man Is Given General Anesthesia for an Elective

question 273

Multiple Choice

A 55-year-old man is given general anesthesia for an elective procedure. His left ventricular pressure-volume loop has switched from a solid line to a dashed line after two hours of surgery, as seen in the figure below ( the loop is unchanged in areas where there is no dashed line) : Which of the following is most likely responsible for this patient's hemodynamic change?

• A)Abdominal aorta clamping
• B)Blood volume loss
• C)Dobutamine administration
• D)Myocardial infarction
• E)Normal saline infusion

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