Final answer:
The correct statement that indicates effective learning about ambulatory electrocardiography (ECG) is that it is useful in patients with symptoms of heart disorder but normal ECG readings at rest, as it monitors heart electrical activity for typically a full day. Therefore, the correct option is c.
Step-by-step explanation:
The correct statement by the student nurse that indicates an effective learning about ambulatory electrocardiography (ECG) is: "It is useful in patients with symptoms of heart disorder but normal ECG readings at rest." Ambulatory ECG, often using a Holter monitor, is a diagnostic tool utilized to continuously monitor the heart's electrical activity for typically a 24-hour period during the patient's normal routine. This method is particularly valuable in detecting intermittent cardiac arrhythmias or ischemic changes that may not be captured in a standard ECG performed in a clinic where the patient is at rest for a short time.
It is important to note that ambulatory electrocardiography does not specifically record the position, shape, size, or outline of the heart; for that, an echocardiogram or other imaging techniques would be used. Moreover, the monitoring period can exceed 12 hours, often lasting a full day, and the information obtained can include the effects of medication on the heart rhythm throughout different times and activities.