Final answer:
Propranolol is a non-selective beta blocker that results in decreased heart rate and blood pressure, and nurses should monitor for changes in cardiac function.
Step-by-step explanation:
When a patient is taking propranolol, a non-selective beta blocker, the expected outcome is a decreased heart rate and blood pressure. This is because propranolol blocks the ß-receptors associated with vasoconstriction and cardioacceleration. The nurse should monitor for changes in cardiac function, which includes bradycardia, a condition where the heart rate is too slow, and hypotension, which is low blood pressure. Monitoring these parameters is crucial because overprescription or high sensitivity to propranolol could lead to dangerously low heart rates and blood pressure, adversely affecting the patient's cardiac function.