A nurse is preparing to administer Adenosine to a client with supraventricular tachycardia (SVT). Which client condition should prompt the nurse to question the administration of adenosine?

Continuous cardiac monitoring is ordered.

The client has a previous history of myocardial infarction.

The client has an allergy to penicillin recorded in the EHR (electronic health record).

The client only has a central line in place.