Answer to Question 1
D
When initiating treatment for tinea corporis, start with an older agent, such as miconazole, because this is available over-the-counter and in generic form and is cheaper. Other agents may be used if the infection does not respond to miconazole or if there are localized side effects to the product.
Answer to Question 2
A
Persistent AF lasts longer than 7 days and episodes fail to terminate on their own, but episodes can be terminated by electrical cardioversion after therapeutic warfarin therapy for 3 weeks. Warfarin does not alter AF. B-Blockers, calcium channel blockers, and digoxin are sometimes given to alter the rate. Verapamil is not an alternative to cardioversion for patients with persistent AF.