Review Question - QID 215073

A 12-year-old boy is brought to the emergency department after collapsing on the field during a soccer game. He says that he felt his heart beating strangely before he lost consciousness but does not recall any injury or trauma prior to falling. His past medical history is significant for a neonatal cardiac defect that was surgically repaired during infancy. Otherwise, he has been healthy and does not currently take any medications. Physical exam reveals a pre-systolic gallop and a systolic murmur that decreases with hand grip. An echocardiogram is obtained in this patient at rest. Which of the parameters seen Figure A would most likely be found in this patient at rest?