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A 55-Year-Old Man Comes to the Emergency Department Due to an Hour

question 331

Multiple Choice

A 55-year-old man comes to the emergency department due to an hour of intense substernal chest burning accompanied by sweating. He has a history of obesity and diet-controlled type 2 diabetes mellitus. On initial evaluation, blood pressure is 110/70 mm Hg and pulse is 60/min and regular. Oxygen saturation is 98% on room air. The patient is comfortable lying flat and no heart murmurs are heard. Lungs are clear on auscultation. Immediate ECG shows normal sinus rhythm with a 2-mm ST-segment elevation in leads II, III, and aVF. Aspirin and morphine are administered. As the patient is about to be transported to the catheterization lab for urgent percutaneous coronary intervention, he develops dizziness and the telemetry monitor shows sinus bradycardia at 40/min. The patient appears pale and diaphoretic and peripheral pulses are faint. Blood pressure is 70/40 mm Hg. Which of the following is the best immediate step for managing this patient's condition?

Definitions:

Fixed Component

A portion of overall costs that does not change in the short term, regardless of the level of output or activity.

Maintenance Cost

Expenses associated with the upkeep and repair of equipment or facilities to ensure their proper functioning and efficiency.

Variable Component

A part or element of production costs or expenses that changes in proportion to the level of output or activity.

Machine-hour

A measure of production time, calculated as the total hours a machine is operated within a specific period.