351.A 69-year-old man is brought to the ED by his son, who states that
his father developed left arm and leg weakness this afternoon and now has
difficulty walking. The patient states that he has a history of heart palpitations
and recently stopped taking his blood-thinning medicine because it was
giving him an upset stomach. His BP is 165/90 mm Hg, HR is 97 beats per
minute, temperature is 98.9°F, and RR is 16 breaths per minute. You suspect
the patient is having a stroke and rush him to the CT scanner. The result of
the head CT is seen below. What percentage of all stroke patients will have
this type of stroke?
376 Emergency Medicine
a. 20%
b. 40%
c. 60%
d. 80%
e. 95%
(Reproduced, with permission, from Brunicardi CF et al.Schwartz’s Principles of Surgery.
New York, NY: McGraw-Hill, 2005: 1616.)