Answer to Question 1
ANS: C
Dobutamine, a relative of dopamine, increases myocardial contractility but produces little systemic arterial constriction. It is incompatible with alkaline solutions.
Answer to Question 2
ANS: D
If lidocaine is contraindicated, then procainamide is used to suppress PVCs and tachycardia that is recurrent. Hypotension may occur if the infusion is too rapid.