A pt with a history of unstable angina is admitted following gastric bypass surgery. The pt reports sudden SOB and chest pain with inspiration and appears anxious and apprehensive. Data are as follows
BP 106/64, HR 124. RR 24. O2 sat 86% on room air
Which of the following is the most likely cause of the symptoms
A. pulmonary embolism
B. anastomatic leak
C. NSTEMI
D. cardiac tamponade