Truths and Lies from the Polysomnography ECG Recording: An Electrophysiologist Perspective

Figure 1

25 seconds snap shot from stage 2 non-REM study in patient number 1. Black arrow shows the onset of sinus arrest lasting 4.5 seconds. After the pause, junctional rhythm is observed. Upper channels (C4-A1) (C3-A2) (O2-A1): electroencephalogram; fourth and fifth channel (ROC-A1) (LOC-A2): oculogram; sixth channel: chin electromyogram; seventh channel: oxygen saturation; eigth channel: electrocardiogram; ninth channel: airflow; tenth channel: chest movement; eleventh channel: abdomen movement.