Catecholamines and sympathomimetic medications should be administered with caution because they:
A) can increase cardiac workload and myocardial oxygen demand.
B) have an average duration of action of between 24 and 48 hours.
C) are associated with paradoxical bradycardia in younger patients.
D) have a tendency to cause a significant decrease in cardiac output.
Answer: A) can increase cardiac workload and myocardial oxygen demand.
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