The Nurse Analyzing a Patient's Electrocardiogram Tracing Would Suspect Atrial

The nurse analyzing a patient's electrocardiogram tracing would suspect atrial fibrillation if it displayed which characteristics? Note: Credit will be given only if all correct choices and no incorrect choices are selected.
Standard Text: Select all that apply.

A) The atrial rate can be calculated by counting the P waves in 6 seconds and multiplying by 10.
B) P waves are replaced by "f waves," or atrial quivering.
C) The PR intervals are measurable.
D) The ventricular rhythm is irregular.
E) The QT interval cannot be measured because the T waves are buried in the "f" waves.