A client with a history of unstable angina presents to the emergency department with constant chest pressure that is unrelieved with rest. The client appears anxious, pale, and diaphoretic. After obtaining the client's vital signs, which action should the nurse take next?

A: An indwelling urinary catheter is unnecessary for monitoring unstable angina and would not address the client’s immediate cardiac concerns. B: Although evaluating perfusion is important, administering aspirin is a higher priority to prevent further damage from potential myocardial ischemia. C: Obtaining consent for coronary angiography and percutaneous coronary intervention is important but should follow the administration of aspirin and other emergency interventions. D: Aspirin is commonly given in suspected ACS to reduce platelet aggregation and prevent further clot formation. Chewing the aspirin improves its absorption and effectiveness in managing the acute event.