An ECG shows an irregularly irregular rhythm with narrow QRS complexes and no visible P waves. Which additional finding would most strongly support a diagnosis of atrial fibrillation rather than multifocal atrial tachycardia (MAT)?

A patient with advanced cirrhosis presents with shifting dullness and a positive fluid wave on examination. Which of the following is the first-line pharmacologic management for grade 2 ascites?

An FNP evaluates a suspicious skin lesion that has become indurated, rapidly enlarged, and intermittently bleeds. What is the best next step?

Which patient scenario most strongly supports initiating pharmacologic treatment for pulmonary sarcoidosis?

According to current guidelines, when should antiretroviral therapy (ART) be started in a patient with newly diagnosed HIV?

A stable patient with new‑onset atrial fibrillation has a heart rate of 140 bpm. Which medication is most appropriate as first‑line therapy to achieve rate control?

An adult patient has progressive weakness, fasciculations, hyperreflexia, and an upgoing great toe with plantar stimulation. Which finding most specifically supports ALS?

Which statement best reflects the clinical importance of intervening before 6 months of age in infants with confirmed hearing loss?

An FNP is reviewing the evaluation of a child with suspected hearing loss. Which principle best reflects appropriate pediatric audiologic assessment?

Which pathophysiologic mechanism best explains the increased stroke risk associated with atrial fibrillation?