A 28-year-old woman undergoes total thyroidectomy. The left recurrent laryngeal nerve is transected during the procedure. Which of the following findings is most likely postoperatively?
Which of the following is most likely to result in oxygen desaturation in a patient with Eisenmenger's syndrome who is scheduled for cesarean delivery?
A 70-year-old man has a pacemaker set at VOO mode at 70 bpm with temporary atrial and ventricular wires placed prior to separation from cardiopulmonary bypass. Fifteen minutes after separation, he develops atrial fibrillation with a ventricular response of 80 to 100 bpm. Which of the following ECG findings is most likely?
(A) Irregular atrial and ventricular complexes with loss of pacer artifacts
(B) Irregular ventricular complexes with preserved ventricular pacer artifacts at 70 bpm
(C) Occasional pacer artifacts when intrinsic ventricular rate is slower than 70 bpm
(D) Regular ventricular complexes at 70 bpm
(E) Ventricular complexes with preserved atrial and ventricular pacer artifacts at 70 bpm
B
Which of the following is a cardiorespiratory effect of epidural block to a T4 sensory level?
The mortality rate of patients given drug A is 12% (8 of 66) and the mortality rate of patients given drug B is 15% (10 of 66). Which of the following tests is most appropriate to compare these mortality rates?
In a patient with aortic stenosis, myocardial ischemia following endotracheal intubation is most likely to result if there is an Increase in
(A) heart rate
(B) left ventricular end-diastolic pressure
(C) myocardial contractility
(D) pulmonary vascular resistance
(E) systemic vascular resistance
A
During induction of anesthesia, a patient is breathing isoflurane from a semiclosed circle absorber system. The temperature-compensated vaporizer is set to deliver isoflurane 1.5%. Which of the following will result in the lowest inspired concentration of isoflurane?
(A) Doubling the length of circle system hoses
(B) Decreasing the barometric pressure
(C) Changing from rubber to plastic breathing hoses