The nurse is reviewing the characteristics of a normal QRS complex on a patient's cardiac rhythm strip
What will the nurse identify as characteristics of this complex? Note: Credit will be given only if all correct choices and no incorrect choices are selected. Select all that apply. 1. The first downward deflection after the P wave is the Q wave.
2. The first upward deflection after the P wave is the R wave.
3. The first downward deflection after the R wave is the S wave.
4. It usually measures less than 0.12 seconds or less than 3 small boxes.
5. It ends at the beginning of the T wave.
1,2,3,4
Rationale 1: The Q wave is the first downward deflection after the P wave.
Rationale 2: The R wave is the first upward deflection in the QRS complex.
Rationale 3: The S wave is the downward deflection following the R wave.
Rationale 4: The QRS complex normally measures less than 0.12 second, or less than three small boxes.
Rationale 5: The ST segment begins at the end of the QRS complex and ends at the beginning of the T wave.
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