A 55-Year-Old Man Undergoes an Elective Surgery Under General Anesthesia

A 55-year-old man undergoes an elective surgery under general anesthesia.  Two hours into the surgery, his left ventricular pressure-volume loop has changed from the solid line to the dashed line, as shown in the image 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

Correct Answer:

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