A 24-Year-Old Man Is Brought to the Emergency Department 15

A 24-year-old man is brought to the emergency department 15 minutes after he sustained a stab wound to the left chest. On arrival, he has rapid, shallow breathing and appears anxious. His pulse is 135/min, respirations are 30/min and shallow, and palpable systolic blood pressure is 80 mm Hg. Examination shows no active external bleeding. There is a 2.5-cm single stab wound to the left chest at the 4th intercostal space at the midclavicular line. Cardiovascular examination shows muffled heart sounds and jugular venous distention. Breath sounds are normal.   Which of the following hemodynamic changes are most likely present in this patient due to his current cardiac condition?

A) A
B) B
C) C
D) D
E) E

Correct Answer:

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