Preoperative administration of alpha-adrenergic inhibitors will usually reverse ECG changes due to
(A) catecholamine myocarditis
(B) Preoperative administration of alpha-adrenergic inhibitors decreases operative mortality
(C) Beta-adrenergic inhibitors should be administered preoperatively only in conjunction with alpha-adrenergic
inhibitors
(D) Vasopressor therapy may be necessary postoperatively for treatment of hypotension
E
A 65-year-old patient with hypertrophic cardiomyopathy has chest pain prior to induction of anesthesia. Pulse is 80 bpm and blood pressure is 130/80 mmHg. The ECG (V5) shows sinus rhythm and new ST-segment depression. The most appropriate management is administration of
Which of the following factors will slow the induction of anesthesia in patients receiving volatile anesthetics?
(A) Addition of 70% nitrous oxide
(B) Increased cardiac output
(C) Increased minute ventilation
(D) Low blood/gas solubility coefficient
(E) Previous pneumonectomy
B
Which of the following would be most likely to increase the duration of seizures during electroconvulsive therapy using a barbiturate and succinyleholine for general anesthesia?
(A) Administration of atropine prior to therapy
(B) Changing to a benzodiazepine for induction
(C) Changing to etomidate for induction
(D) Adding phenytoin to preoperative medications
(E) Decreasing the dose of barbiturate used for induction
A patient receiving monoamine oxidase inhibitor therapy for depression undergoes an emergency cholecystectomy. Which of the following is the best means of providing postoperative analgesia in this patient?
(A) Epidural analgesia using 0.25% bupivacaine
(B) Intravenous meperidine
(C) Epidural analgesia using meperidine
(D) Epidural analgesia using 1% lidocaine with epinephrine
(E) Intercostal analgesia using 1% lidocaine with epinephrine
A patient who is scheduled for a parathyroidectomy for a parathyroid adenoma has a preoperative serum calcium concentration of 13.5 mg/dl. The ECG shows no acute changes. The most appropriate preoperative management is administration of
(A) calcitonin
(B) hydrocortisone
(C) intravenous saline solution
(D) mannitol
(E) potassium phosphate
C
The decreased duration of action of an intravenous dose of fentanyl compared with an intravenous dose of morphine is best explained by