It is incredible what you will learn as a clinician once you get involved with sleep apnea.
I just met a woman with co-morbidities of diabetes and hypertension. The conversation led to how miserable she was when waking up from a terrible night’s sleep. In this bar graph, you can see how she desaturated for over 30 minutes. You can also appreciate the spikes in her heart rate during that time span, while she struggles to breathe. Every time i see this, Pink Floyd’s “Breathe” pops into my head