Identify an accurate statement about the electrocardiogram (ECG).
A. An ECG is a recording of the electrical activity of the heart that is represented in a characteristic waveform.
B. An ECG typically records the electrical activity of the heart from two different body locations.
C. An ECG cannot be used to detect cardiac arrhythmias.
D. An ECG is a visual image generated by the reflected sound waves in an ultrasound examination of the heart.
Answer: A
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