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You are performing CPR on an 80-year-old woman whose cardiac arrest was witnessed by her husband. Several intubation attempts have been unsuccessful, but ventilations with a bag-mask device are producing adequate chest rise. IV access has been obtained and 1 mg of epinephrine has been administered. The cardiac monitor displays a narrow QRS complex rhythm at a rate of 70 beats/min. According to the patient’s husband, she has had numerous episodes of diarrhea over the past 24 hours and has not had much of an appetite. The MOST appropriate next action should be to:

A pulse that alternates in strength from one beat to the next beat is called:

A concordant precordial pattern exists when all QRS complexes:

Pupils that differ in size by less than 1 mm:

Hypomagnesemia would likely result in decreased:

Sympathetic nerves are regulated primarily by:

If the paramedic must initiate drug therapy in the field for hypertensive encephalopathy, he or she should:

Excessive preload over time would lead to:

Jugular venous distention in a patient sitting at a 45-degree angle:

If the heart’s secondary pacemaker becomes ischemic and fails to initiate an electrical impulse: