A 79-year-old woman with a history of coronary artery disease who underwent a coronary artery bypass graft surgery in 2000 is brought to the ED by her family for two days of worsening shortness of breath. For the past 2 days, she has not gotten out of bed and is confused. She does not have chest pain, fevers, or cough. Her temperature is 98.1°F, blood pressure is 85/50 mm Hg, heart rate is 125 beats per minute, and respiratory rate is 26 breaths per minute. On exam, she is unable to follow commands and is oriented only to name. The cardiovascular exam reveals tachycardia with no murmurs. Her lungs have rales bilaterally at the bases. The abdomen is soft, nontender, and nondistended. Lower extremities have 2+ edema to the knee bilaterally. Which of the following is the most likely diagnosis?
a. Hypovolemic shock
b. Neurogenic shock
c. Cardiogenic shock
d. Anaphylactic shock
e. Septic shock
Please submit your answer in the "comment" section. The person with the most correct entries at the end of six weeks will receive a copy of the book PreTest Emergency Medicine.
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