Unknown Which treatment would be least effective for asystole? A External pacemaker B Intravenous epinephrine, 10 ml. of 1:10,000. C Intravenous calcium gluconate, 10 ml. of 10% solution D Intravenous atropine, 0.5 mg. 💡 Explanation Which treatment would be least effective for asystole? ✓ Correct Answer: C. Intravenous calcium gluconate, 10 ml. of 10% solution