CEN review ENA CH 7 exam questions and answers with solutions 2025

A patient with chest pain has a 12-lead electrocardiogram that shows a new onset left bundle branch block. There is > 1 mm concordant ST elevation in lead aVF. What is the priority intervention for this patient? A. Continuous ST-segment monitoring B. Serial troponin measurements C. Preparing the patient for transport to the cardiac catheterization lab D. Admission to a telemetry unit for observation - ANSWER C. Preparing the patient for transport to the cardiac catheterization lab During the completion of a 12-lead electrocardiogram, the nurse identifies excessive artifact in lead II and lead III. To resolve this technical difficulty, the nurse should: A. change the right arm electrode. B. check for cable movement. C. change the left leg electrode. D. instruct the patient to momentarily hold their breath. - ANSWER C. change the left leg electrode. A patient with ST elevation in leads II, III, and aVF is likely to experience an infarct in which location of the heart? A. Inferior B. Anterior C. Lateral D. Posterior - ANSWER A. Inferior A patient states they awoke from sleep with midsternal chest pain approximately 4-5 hours ago. In the presence of an acute myocardial infarction (AMI), the initial elevation of the troponin cardiac biomarkers occurs within: A. 1-2 hours of onset of an AMI. B. 3-12 hours of onset of an AMI. C. 24-30 hours of onset of an AMI. D. 10-24 hours of onset of an AMI. - ANSWER B. 3-12 hours of onset of an AMI. The nurse suspects a patient may have an acute aortic dissection when, during the history-taking process, the patient describes the pain as: A. squeezing, burning epigastric pain that may radiate to the middle back area. B. right upper quadrant pain referred