Holter monitor is used in diagnostic testing to primarily:
A. Monitor blood pressure levels throughout the day
B. Detect irregularities in the digestive system
C. Record the heart's activity over a period of 24 to 48 hours Correct
D. Measure the oxygen level in the blood
Rationale: The Holter monitor is specifically designed to record the heart's electrical activity continuously over a period of 24 to 48 hours, making option C the most accurate choice.
Option A is incorrect as blood pressure monitoring is typically done with a sphygmomanometer or an ambulatory blood pressure monitor, not a Holter monitor.
Option B is wrong because the Holter monitor does not assess digestive system irregularities; it focuses solely on cardiac function.
Option D is also inaccurate, as measuring blood oxygen levels requires a pulse oximeter, not a Holter monitor.
