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94.

A 44-year-old male complains of severe abdominal pain and hematemesis. On examination: respiratory rate - 24/min, normal respiratory sounds over the lungs, SpO - weak signal, heart rate - 130/min, no pulse on the distal arteries, blood pressure - 75/50 mmHg, the skin is pale and sweaty, on the ECG - a regular rhythm with narrow QRS complexes. Which of the following should be performed?

A. cardioversion.
B. vagal maneuver.
C. adenosine 6mg iv rapid bolus.
D. fluid therapy.
E. amiodarone 300mg iv within 20-60 minutes.

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