A 44-Year-Old Woman Comes to the Emergency Department Because of a Sudden

A 44-year-old woman comes to the emergency department because of a sudden midsternal chest pain, shortness of breath, and cough with bloody sputum for the past 3 hours. Medical history is significant for hypertension, hyperlipidemia, and chronic kidney disease. he patient takes multiple medications and has no drug allergies. She returned from a trip to Europe 2 days ago. Blood pressure is 115/75 mm Hg and pulse is 105/min.  The lungs are clear on auscultation.  ECG shows sinus tachycardia.  Ventilation/perfusion scanning is ordered.  Which of the following findings would help confirm the suspected diagnosis in this patient?

A) Absence of ventilation and perfusion abnormalities
B) An area showing both ventilation and perfusion defects
C) A perfusion defect without an associated ventilation defect
D) A ventilation defect without an associated perfusion defect
E) Several small areas of matched perfusion and ventilation defects