A nurse is preparing to administer verapamil to a client who is 2 days postmyocardial infarction.The nurse should monitor the client for which of the following outcomes as a therapeutic response to the medication?

Choice A rationaleVerapamil is a calcium channel blocker that typically reduces heart rate rather than increasing it by inhibiting calcium ion influx in the heart muscle, which decreases the heart's workload.Choice B rationaleVerapamil generally lowers blood pressure by relaxing the smooth muscles in blood vessels, leading to vasodilation, not an increase in blood pressure.Choice C rationaleVerapamil helps reduce pulmonary congestion by decreasing the workload on the heart, which can help alleviate symptoms of heart failure, but this is not the primary therapeutic effect in post-myocardial infarction patients.Choice D rationaleVerapamil decreases anginal pain by relaxing coronary blood vessels, improving blood flow to the heart, and reducing myocardial oxygen demand, which is a primary therapeutic response.