Where would documentation of "Atrial fibrillation with rapid ventricular response" typically appear?

The documentation of "Atrial fibrillation with rapid ventricular response" would typically appear in an ECG report because this condition involves the heart's electrical activity, which is specifically captured through an electrocardiogram (ECG). The ECG provides real-time data about heart rhythms and can show the presence of atrial fibrillation along with other details such as the heart rate and rhythm abnormalities.

In contrast, an admission order primarily includes instructions for a patient's care upon admission and would not typically detail specific diagnoses or conditions. A laboratory report focuses on blood tests and other lab results rather than cardiac rhythm, and a radiology report deals with imaging studies, such as X-rays or MRIs, which are not designed to assess electrical heart activity. Therefore, the ECG report is the most appropriate source for documenting this particular cardiac condition.