The P wave and QRS complex are related to ________
A) the circulation of the blood
B) the diastolic pressure
C) an electrocardiogram
D) an aneurysm
C
Explanation: A) These are not related to the circulation of the blood.
B) These are not related to the diastolic pressure.
C) Correct! An electrocardiogram is a record of the electrical activity of the heart, which includes P waves and QRS complexes.
D) These are not related to an aneurysm.
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