The nurse is teaching a class on dysrhythmias and associated therapy. The nurse asks the class, "Which cardiac dysrhythmia would result in the lowest cardiac output, and what treatment would be effective?"
The class best demonstrates understanding by responding that _____ results in the lowest cardiac output, and treatment includes _____.
a. atrial flutter; lidocaine
b. tachycardia; atropine
c. first-degree heart block; verapamil (Calan)
d. ventricular fibrillation; defibrillation
ANS: D
With ventricular fibrillation there is no cardiac output, because the pumping action of the heart stops. Treatment with electrical countershock is indicated to restore cardiac function. Atrial flutter, tachycardia, and first-degree heart block do not result in the lowest cardiac output.
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