The patient's ECG shows the following characteristics: PR interval 0.08, QRS 0.08, and isoelectric ST segment. The nurse realizes that these characteristics indicate which condition?
1. Faster-than-normal conduction from the SA node to the ventricles, normal conduction through the ventricles, and normal ST segment
2. Faster-than-normal conduction from the SA node to the ventricles, faster-than-normal conduction through the ventricles. and normal ST segment
3. Normal conduction from the SA node to the ventricles, normal conduction through the ventricles, and normal ST segment
4. Normal conduction from the SA node to the ventricles, normal conduction through the ventricles, and abnormal ST segment
1
Rationale 1: The PR interval is normally 0.12 second (up to 0.24 second is considered normal in patients over age 65).
Rationale 2: The normal duration of a QRS complex is 0.06 to 0.10 second.
Rationale 3: The PR interval is normally 0.12 second (up to 0.24 second is considered normal in patients over age 65).
Rationale 4: The ST segment, the period from the end of the ARS complex to the beginning of the T wave, should be isoelectric.
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