A 16-Year-Old Previously Healthy Man Is Admitted to the Emergency

A 16-year-old previously healthy man is admitted to the emergency department due to a stab at the thorax. On examination, the patient is not conscious. The patient's blood pressure is 90/60 and the pulse is 120/min. The physical examination shows an anterior stab wound lateral to the sternum, at the level of the fourth intercostal space. Which of the following structures is most likely to have been injured in this patient?

A) Left Atrium
B) Left ventricle
C) Right Atrium
D) Right ventricle