10 free CCRN practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
CCRN Practice Test 2Tutor mode
Question 1 of 10
Cardiovascular
A patient admitted with pneumonia is receiving IV azithromycin and takes methadone at home. This morning the QTc was 560 ms and serum magnesium was 1.4 mg/dL. The monitor now shows repeated self-terminating runs of the rhythm below. Between runs the patient is alert, with BP 108/64. Which medication should the nurse anticipate administering FIRST?
Monitor strip, lead II
Two sinus beats with a markedly prolonged QT interval, followed by a run of polymorphic ventricular tachycardia whose QRS amplitude waxes and wanes around the baseline. Figure not drawn to scale.