In polysomnography, which channel is used to monitor cardiac electrical activity?

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Multiple Choice

In polysomnography, which channel is used to monitor cardiac electrical activity?

Explanation:
Monitoring cardiac electrical activity in polysomnography is done with the electrocardiogram, EKG. This channel records the heart’s electrical impulses, allowing calculation of heart rate and rhythm during sleep and the detection of any nocturnal arrhythmias. Other standard PSG channels track different signals: EEG measures brain activity for sleep stages, EOG tracks eye movements, and EMG measures muscle tone (typically chin). Since those others do not reflect heart electrical activity, the EKG is the correct choice.

Monitoring cardiac electrical activity in polysomnography is done with the electrocardiogram, EKG. This channel records the heart’s electrical impulses, allowing calculation of heart rate and rhythm during sleep and the detection of any nocturnal arrhythmias. Other standard PSG channels track different signals: EEG measures brain activity for sleep stages, EOG tracks eye movements, and EMG measures muscle tone (typically chin). Since those others do not reflect heart electrical activity, the EKG is the correct choice.

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