An anesthetized patient in the sitting position has a mean arterial pressure of 80 mmHg measured with a transducer placed at the level of the heart. Mean cerebral arterial pressure 20 cm above the transducer is
(A) 100 mmHg
(B) 80 mmHg
(C) 65 mmHg
(D) 60 mmHg
(E) 50 mmHg
C
Which of the following statements concerning isolated mitral stenosis is true?
(A) Afterload reduction increases cardiac output
(B) Pulmonary artery occlusion pressure overestimates left ventricular filling pressure
(C) Pulmonary hypertension is irreversible
(D) Tachycardia decreases the mitral transvalvular gradient
(E) Thermodilution cardiac output measurements are unreliable
A previously healthy 28-year-old woman scheduled for laparoscopic tubal ligation becomes, agitated and refuses to undergo the procedure after being brought to the operating room. This behavior most likely resulted from preoperative administration of
Prolonged respiratory depression following administration of morphine is more likely in patients with chronic renal faillure than in patients with normal kidney function because of